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Address	Label	Metrics	Data Type	Period Type	boi_dim:BCC	boi_dim:CSC	boi_dim:IPR	boi_dim:MCC	boi_dim:MUU	boi_dim:PLA	boi_dim:RPC	boi_dim:SEC
r0.1	label_boi_a2/Affiliated companies				N/A	N/A	boi_IP:x23	N/A	N/A	N/A	boi_RP:x24	N/A
r0.2	label_boi_a2/Consolidated companies				N/A	N/A	boi_IP:x26	N/A	N/A	N/A	boi_RP:x24	N/A
r0.3	label_boi_a2/Total				N/A	N/A	boi_IP:x31	N/A	N/A	N/A	boi_RP:x24	N/A
r1.1	Consolidated/Affiliated companies				N/A	boi_CS:x2	boi_IP:x23	N/A	N/A	N/A	boi_RP:x24	N/A
r1.2	Consolidated/Consolidated companies				N/A	boi_CS:x2	boi_IP:x26	N/A	N/A	N/A	boi_RP:x24	N/A
r1.3	Consolidated/Total				N/A	boi_CS:x2	boi_IP:x31	N/A	N/A	N/A	boi_RP:x24	N/A
1.1	Equity investments under the equity method (including reputation)/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x683	N/A	N/A	boi_RP:x24	N/A
1.2	Equity investments under the equity method (including reputation)/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x683	N/A	N/A	boi_RP:x24	N/A
1.3	Equity investments under the equity method (including reputation)/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x683	N/A	N/A	boi_RP:x24	N/A
r3.1	Other investments:/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x23	N/A	N/A	N/A	boi_RP:x24	N/A
r3.2	Other investments:/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x26	N/A	N/A	N/A	boi_RP:x24	N/A
r3.3	Other investments:/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x31	N/A	N/A	N/A	boi_RP:x24	N/A
2.1	Payments in account of shares/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x684	N/A	N/A	boi_RP:x24	N/A
2.2	Payments in account of shares/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x684	N/A	N/A	boi_RP:x24	N/A
2.3	Payments in account of shares/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x684	N/A	N/A	boi_RP:x24	N/A
3.1	Certificates right to acquire shares/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x685	N/A	N/A	boi_RP:x24	N/A
3.2	Certificates right to acquire shares/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x685	N/A	N/A	boi_RP:x24	N/A
3.3	Certificates right to acquire shares/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x685	N/A	N/A	boi_RP:x24	N/A
4.1	Other benefits/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x686	N/A	N/A	boi_RP:x24	N/A
4.2	Other benefits/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x686	N/A	N/A	boi_RP:x24	N/A
4.3	Other benefits/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x686	N/A	N/A	boi_RP:x24	N/A
5.1	Convertible securities/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x687	N/A	N/A	boi_RP:x24	N/A
5.2	Convertible securities/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x687	N/A	N/A	boi_RP:x24	N/A
5.3	Convertible securities/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x687	N/A	N/A	boi_RP:x24	N/A
6.1	Subordinated notes/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x688	N/A	N/A	boi_RP:x24	N/A
6.2	Subordinated notes/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x688	N/A	N/A	boi_RP:x24	N/A
6.3	Subordinated notes/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x688	N/A	N/A	boi_RP:x24	N/A
7.1	Shareholders' loans/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x689	N/A	N/A	boi_RP:x24	N/A
7.2	Shareholders' loans/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x689	N/A	N/A	boi_RP:x24	N/A
7.3	Shareholders' loans/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x689	N/A	N/A	boi_RP:x24	N/A
8.1	Total investments/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x54	N/A	N/A	boi_RP:x24	N/A
8.2	Total investments/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x54	N/A	N/A	boi_RP:x24	N/A
8.3	Total investments/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x54	N/A	N/A	boi_RP:x24	N/A
9.1	of which: Gains (Losses) from the date of purchased/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x23	boi_MC:x191	N/A	N/A	boi_RP:x24	N/A
9.2	of which: Gains (Losses) from the date of purchased/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x26	boi_MC:x191	N/A	N/A	boi_RP:x24	N/A
9.3	of which: Gains (Losses) from the date of purchased/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x31	boi_MC:x191	N/A	N/A	boi_RP:x24	N/A
r12.1	Equity/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x23	boi_MC:x399	N/A	N/A	boi_RP:x24	N/A
r12.2	Equity/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x26	boi_MC:x399	N/A	N/A	boi_RP:x24	N/A
r12.3	Equity/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x31	boi_MC:x399	N/A	N/A	boi_RP:x24	N/A
10.1	Adjustments in respect of securities available to sale/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x23	boi_MC:x399	N/A	boi_PL:x1	boi_RP:x24	N/A
10.2	Adjustments in respect of securities available to sale/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x26	boi_MC:x399	N/A	boi_PL:x1	boi_RP:x24	N/A
10.3	Adjustments in respect of securities available to sale/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x31	boi_MC:x399	N/A	boi_PL:x1	boi_RP:x24	N/A
11.1	Financial statements translation adjustments/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x23	boi_MC:x399	N/A	boi_PL:x30	boi_RP:x24	N/A
11.2	Financial statements translation adjustments/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x26	boi_MC:x399	N/A	boi_PL:x30	boi_RP:x24	N/A
11.3	Financial statements translation adjustments/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x31	boi_MC:x399	N/A	boi_PL:x30	boi_RP:x24	N/A
12.1	Others/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x23	boi_MC:x399	N/A	boi_PL:x27	boi_RP:x24	N/A
12.2	Others/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x26	boi_MC:x399	N/A	boi_PL:x27	boi_RP:x24	N/A
12.3	Others/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x2	boi_IP:x31	boi_MC:x399	N/A	boi_PL:x27	boi_RP:x24	N/A
r16.1	goodwill/Affiliated companies				boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
r16.2	goodwill/Consolidated companies				boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
r16.3	goodwill/Total				boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
13.1	The original amount/Affiliated companies	boi_met:mi376	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
13.2	The original amount/Consolidated companies	boi_met:mi376	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
13.3	The original amount/Total	boi_met:mi376	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
14.1	Surplus/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
14.2	Surplus/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
14.3	Surplus/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
r19.1	Information on marketable investments:/Affiliated companies				boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
r19.2	Information on marketable investments:/Consolidated companies				boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
r19.3	Information on marketable investments:/Total				boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
15.1	Books value/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
15.2	Books value/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
15.3	Books value/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
16.1	Market value/Affiliated companies	boi_met:mi5	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x23	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
16.2	Market value/Consolidated companies	boi_met:mi5	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x26	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
16.3	Market value/Total	boi_met:mi5	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x2	boi_IP:x31	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
17.1	The bank's share in profits of affiliated companies by tax/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x11	boi_CS:x2	boi_IP:x23	boi_MC:x690	boi_MU:x1	N/A	boi_RP:x24	N/A
17.2	The bank's share in profits of affiliated companies by tax/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x11	boi_CS:x2	boi_IP:x26	boi_MC:x690	boi_MU:x1	N/A	boi_RP:x24	N/A
17.3	The bank's share in profits of affiliated companies by tax/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x11	boi_CS:x2	boi_IP:x31	boi_MC:x690	boi_MU:x1	N/A	boi_RP:x24	N/A
18.1	Impairment losses of affiliated companies/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x10	boi_CS:x2	boi_IP:x23	boi_MC:x691	boi_MU:x1	N/A	boi_RP:x24	N/A
18.2	Impairment losses of affiliated companies/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x10	boi_CS:x2	boi_IP:x26	boi_MC:x691	boi_MU:x1	N/A	boi_RP:x24	N/A
18.3	Impairment losses of affiliated companies/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x10	boi_CS:x2	boi_IP:x31	boi_MC:x691	boi_MU:x1	N/A	boi_RP:x24	N/A
19.1	Cancellation of Impairment losses of affiliated companies/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x9	boi_CS:x2	boi_IP:x23	boi_MC:x692	boi_MU:x1	N/A	boi_RP:x24	N/A
19.2	Cancellation of Impairment losses of affiliated companies/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x9	boi_CS:x2	boi_IP:x26	boi_MC:x692	boi_MU:x1	N/A	boi_RP:x24	N/A
19.3	Cancellation of Impairment losses of affiliated companies/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x9	boi_CS:x2	boi_IP:x31	boi_MC:x692	boi_MU:x1	N/A	boi_RP:x24	N/A
r25.1	Provision for taxes:/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x2	boi_IP:x23	N/A	boi_MU:x1	N/A	boi_RP:x24	N/A
r25.2	Provision for taxes:/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x2	boi_IP:x26	N/A	boi_MU:x1	N/A	boi_RP:x24	N/A
r25.3	Provision for taxes:/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x2	boi_IP:x31	N/A	boi_MU:x1	N/A	boi_RP:x24	N/A
20.1	Current/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x2	boi_IP:x23	boi_MC:x694	boi_MU:x1	N/A	boi_RP:x24	N/A
20.2	Current/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x2	boi_IP:x26	boi_MC:x694	boi_MU:x1	N/A	boi_RP:x24	N/A
20.3	Current/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x2	boi_IP:x31	boi_MC:x694	boi_MU:x1	N/A	boi_RP:x24	N/A
21.1	Deferred/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x2	boi_IP:x23	boi_MC:x695	boi_MU:x1	N/A	boi_RP:x24	N/A
21.2	Deferred/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x2	boi_IP:x26	boi_MC:x695	boi_MU:x1	N/A	boi_RP:x24	N/A
21.3	Deferred/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x2	boi_IP:x31	boi_MC:x695	boi_MU:x1	N/A	boi_RP:x24	N/A
22.1	Total provision for taxes/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x2	boi_IP:x23	boi_MC:x693	boi_MU:x1	N/A	boi_RP:x24	N/A
22.2	Total provision for taxes/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x2	boi_IP:x26	boi_MC:x693	boi_MU:x1	N/A	boi_RP:x24	N/A
22.3	Total provision for taxes/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x2	boi_IP:x31	boi_MC:x693	boi_MU:x1	N/A	boi_RP:x24	N/A
23.1	Share in profits of affiliated companies after tax liabilities/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x11	boi_CS:x2	boi_IP:x23	boi_MC:x191	boi_MU:x1	N/A	boi_RP:x24	N/A
23.2	Share in profits of affiliated companies after tax liabilities/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x11	boi_CS:x2	boi_IP:x26	boi_MC:x191	boi_MU:x1	N/A	boi_RP:x24	N/A
23.3	Share in profits of affiliated companies after tax liabilities/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x11	boi_CS:x2	boi_IP:x31	boi_MC:x191	boi_MU:x1	N/A	boi_RP:x24	N/A
r30.1	Bank/Affiliated companies				N/A	boi_CS:x1	boi_IP:x23	N/A	N/A	N/A	boi_RP:x24	N/A
r30.2	Bank/Consolidated companies				N/A	boi_CS:x1	boi_IP:x26	N/A	N/A	N/A	boi_RP:x24	N/A
r30.3	Bank/Total				N/A	boi_CS:x1	boi_IP:x31	N/A	N/A	N/A	boi_RP:x24	N/A
24.1	Equity investments under the equity method (including reputation)/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x683	N/A	N/A	boi_RP:x24	N/A
24.2	Equity investments under the equity method (including reputation)/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x683	N/A	N/A	boi_RP:x24	N/A
24.3	Equity investments under the equity method (including reputation)/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x683	N/A	N/A	boi_RP:x24	N/A
r32.1	Other investments:/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x23	N/A	N/A	N/A	boi_RP:x24	N/A
r32.2	Other investments:/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x26	N/A	N/A	N/A	boi_RP:x24	N/A
r32.3	Other investments:/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x31	N/A	N/A	N/A	boi_RP:x24	N/A
25.1	Payments in account of shares/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x684	N/A	N/A	boi_RP:x24	N/A
25.2	Payments in account of shares/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x684	N/A	N/A	boi_RP:x24	N/A
25.3	Payments in account of shares/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x684	N/A	N/A	boi_RP:x24	N/A
26.1	Certificates right to acquire shares/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x685	N/A	N/A	boi_RP:x24	N/A
26.2	Certificates right to acquire shares/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x685	N/A	N/A	boi_RP:x24	N/A
26.3	Certificates right to acquire shares/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x685	N/A	N/A	boi_RP:x24	N/A
27.1	Other benefits/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x686	N/A	N/A	boi_RP:x24	N/A
27.2	Other benefits/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x686	N/A	N/A	boi_RP:x24	N/A
27.3	Other benefits/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x686	N/A	N/A	boi_RP:x24	N/A
28.1	Convertible securities/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x687	N/A	N/A	boi_RP:x24	N/A
28.2	Convertible securities/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x687	N/A	N/A	boi_RP:x24	N/A
28.3	Convertible securities/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x687	N/A	N/A	boi_RP:x24	N/A
29.1	Subordinated notes/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x688	N/A	N/A	boi_RP:x24	N/A
29.2	Subordinated notes/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x688	N/A	N/A	boi_RP:x24	N/A
29.3	Subordinated notes/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x688	N/A	N/A	boi_RP:x24	N/A
30.1	Shareholders' loans/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x689	N/A	N/A	boi_RP:x24	N/A
30.2	Shareholders' loans/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x689	N/A	N/A	boi_RP:x24	N/A
30.3	Shareholders' loans/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x689	N/A	N/A	boi_RP:x24	N/A
31.1	Total investments/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x54	N/A	N/A	boi_RP:x24	N/A
31.2	Total investments/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x54	N/A	N/A	boi_RP:x24	N/A
31.3	Total investments/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x54	N/A	N/A	boi_RP:x24	N/A
32.1	of which: Gains (Losses) from the date of purchased/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x23	boi_MC:x191	N/A	N/A	boi_RP:x24	N/A
32.2	of which: Gains (Losses) from the date of purchased/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x26	boi_MC:x191	N/A	N/A	boi_RP:x24	N/A
32.3	of which: Gains (Losses) from the date of purchased/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x31	boi_MC:x191	N/A	N/A	boi_RP:x24	N/A
r41.1	Equity/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x23	boi_MC:x399	N/A	N/A	boi_RP:x24	N/A
r41.2	Equity/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x26	boi_MC:x399	N/A	N/A	boi_RP:x24	N/A
r41.3	Equity/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x31	boi_MC:x399	N/A	N/A	boi_RP:x24	N/A
33.1	Adjustments in respect of securities available to sale/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x23	boi_MC:x399	N/A	boi_PL:x1	boi_RP:x24	N/A
33.2	Adjustments in respect of securities available to sale/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x26	boi_MC:x399	N/A	boi_PL:x1	boi_RP:x24	N/A
33.3	Adjustments in respect of securities available to sale/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x31	boi_MC:x399	N/A	boi_PL:x1	boi_RP:x24	N/A
34.1	Financial statements translation adjustments/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x23	boi_MC:x399	N/A	boi_PL:x30	boi_RP:x24	N/A
34.2	Financial statements translation adjustments/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x26	boi_MC:x399	N/A	boi_PL:x30	boi_RP:x24	N/A
34.3	Financial statements translation adjustments/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x31	boi_MC:x399	N/A	boi_PL:x30	boi_RP:x24	N/A
35.1	Others/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x23	boi_MC:x399	N/A	boi_PL:x27	boi_RP:x24	N/A
35.2	Others/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x26	boi_MC:x399	N/A	boi_PL:x27	boi_RP:x24	N/A
35.3	Others/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x3	boi_CS:x1	boi_IP:x31	boi_MC:x399	N/A	boi_PL:x27	boi_RP:x24	N/A
r45.1	Reputation/Affiliated companies				boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
r45.2	Reputation/Consolidated companies				boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
r45.3	Reputation/Total				boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
36.1	The original amount/Affiliated companies	boi_met:mi376	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
36.2	The original amount/Consolidated companies	boi_met:mi376	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
36.3	The original amount/Total	boi_met:mi376	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
37.1	Surplus/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
37.2	Surplus/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
37.3	Surplus/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x837	N/A	N/A	boi_RP:x24	N/A
r48.1	Information on marketable investments:/Affiliated companies				boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
r48.2	Information on marketable investments:/Consolidated companies				boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
r48.3	Information on marketable investments:/Total				boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
38.1	Books value/Affiliated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
38.2	Books value/Consolidated companies	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
38.3	Books value/Total	boi_met:mi1	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
39.1	Market value/Affiliated companies	boi_met:mi5	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x23	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
39.2	Market value/Consolidated companies	boi_met:mi5	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x26	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
39.3	Market value/Total	boi_met:mi5	xbrli:monetaryItemType	instant	boi_BC:x1	boi_CS:x1	boi_IP:x31	boi_MC:x683	N/A	N/A	boi_RP:x24	boi_SE:x91
40.1	The bank's share in profits of affiliated companies by tax/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x11	boi_CS:x1	boi_IP:x23	boi_MC:x690	boi_MU:x1	N/A	boi_RP:x24	N/A
40.2	The bank's share in profits of affiliated companies by tax/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x11	boi_CS:x1	boi_IP:x26	boi_MC:x690	boi_MU:x1	N/A	boi_RP:x24	N/A
40.3	The bank's share in profits of affiliated companies by tax/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x11	boi_CS:x1	boi_IP:x31	boi_MC:x690	boi_MU:x1	N/A	boi_RP:x24	N/A
41.1	Impairment losses of affiliated companies/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x10	boi_CS:x1	boi_IP:x23	boi_MC:x691	boi_MU:x1	N/A	boi_RP:x24	N/A
41.2	Impairment losses of affiliated companies/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x10	boi_CS:x1	boi_IP:x26	boi_MC:x691	boi_MU:x1	N/A	boi_RP:x24	N/A
41.3	Impairment losses of affiliated companies/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x10	boi_CS:x1	boi_IP:x31	boi_MC:x691	boi_MU:x1	N/A	boi_RP:x24	N/A
42.1	Cancellation of Impairment losses of affiliated companies/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x9	boi_CS:x1	boi_IP:x23	boi_MC:x692	boi_MU:x1	N/A	boi_RP:x24	N/A
42.2	Cancellation of Impairment losses of affiliated companies/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x9	boi_CS:x1	boi_IP:x26	boi_MC:x692	boi_MU:x1	N/A	boi_RP:x24	N/A
42.3	Cancellation of Impairment losses of affiliated companies/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x9	boi_CS:x1	boi_IP:x31	boi_MC:x692	boi_MU:x1	N/A	boi_RP:x24	N/A
r54.1	Provision for taxes:/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x1	boi_IP:x23	N/A	boi_MU:x1	N/A	boi_RP:x24	N/A
r54.2	Provision for taxes:/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x1	boi_IP:x26	N/A	boi_MU:x1	N/A	boi_RP:x24	N/A
r54.3	Provision for taxes:/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x1	boi_IP:x31	N/A	boi_MU:x1	N/A	boi_RP:x24	N/A
43.1	Current/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x1	boi_IP:x23	boi_MC:x694	boi_MU:x1	N/A	boi_RP:x24	N/A
43.2	Current/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x1	boi_IP:x26	boi_MC:x694	boi_MU:x1	N/A	boi_RP:x24	N/A
43.3	Current/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x1	boi_IP:x31	boi_MC:x694	boi_MU:x1	N/A	boi_RP:x24	N/A
44.1	Deferred/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x1	boi_IP:x23	boi_MC:x695	boi_MU:x1	N/A	boi_RP:x24	N/A
44.2	Deferred/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x1	boi_IP:x26	boi_MC:x695	boi_MU:x1	N/A	boi_RP:x24	N/A
44.3	Deferred/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x1	boi_IP:x31	boi_MC:x695	boi_MU:x1	N/A	boi_RP:x24	N/A
45.1	Total provision for taxes/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x1	boi_IP:x23	boi_MC:x693	boi_MU:x1	N/A	boi_RP:x24	N/A
45.2	Total provision for taxes/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x1	boi_IP:x26	boi_MC:x693	boi_MU:x1	N/A	boi_RP:x24	N/A
45.3	Total provision for taxes/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x12	boi_CS:x1	boi_IP:x31	boi_MC:x693	boi_MU:x1	N/A	boi_RP:x24	N/A
46.1	Share in profits of affiliated companies after tax liabilities/Affiliated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x11	boi_CS:x1	boi_IP:x23	boi_MC:x191	boi_MU:x1	N/A	boi_RP:x24	N/A
46.2	Share in profits of affiliated companies after tax liabilities/Consolidated companies	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x11	boi_CS:x1	boi_IP:x26	boi_MC:x191	boi_MU:x1	N/A	boi_RP:x24	N/A
46.3	Share in profits of affiliated companies after tax liabilities/Total	boi_met:md13	xbrli:monetaryItemType	instant	boi_BC:x11	boi_CS:x1	boi_IP:x31	boi_MC:x191	boi_MU:x1	N/A	boi_RP:x24	N/A