| 契約者配当準備金の増減異動及び契約者配当金の支払額に関する注記 | ja | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 契約者配当準備金の増減異動及び契約者配当金の支払額に関する注記、保険業 [テキストブロック] | ja | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |
| Notes regarding increase and decrease in reserve for policyholder dividends and payments of policyholder dividends | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Notes regarding increase and decrease in reserve for policyholder dividends and payments of policyholder dividends-INS [text block] | en | http://www.xbrl.org/2003/role/verboseLabel | http://www.xbrl.org/2003/role/link |