| r0.c0 | Subclassifications of assets, liabilities and equities [abstract]/lbl30457 | ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract | xbrli:stringItemType | duration | xs:date('2020-12-31') |
| r1.c0 | Investments in subsidiaries, joint ventures and associates [abstract]/lbl30457 | ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociatesAbstract | xbrli:stringItemType | duration | xs:date('2020-12-31') |
| r2.c0 | Investments in subsidiaries/lbl30457 | ifrs-full:InvestmentsInSubsidiaries | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r3.c0 | Investments in joint ventures/lbl30457 | ifrs-full:InvestmentsInJointVentures | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r4.c0 | Investments in associates/lbl30457 | ifrs-full:InvestmentsInAssociates | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r5.c0 | Investments in subsidiaries, joint ventures and associates/lbl30457 | ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociates | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r6.c0 | Cash and cash equivalents [abstract]/lbl30457 | ifrs-full:CashAndCashEquivalentsAbstract | xbrli:stringItemType | duration | xs:date('2020-12-31') |
| r7.c0 | Cash [abstract]/lbl30457 | ifrs-full:CashAbstract | xbrli:stringItemType | duration | xs:date('2020-12-31') |
| r8.c0 | Cash on hand/lbl30457 | ifrs-full:CashOnHand | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r9.c0 | Balances with banks/lbl30457 | ifrs-full:BalancesWithBanks | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r10.c0 | Cash/lbl30457 | ifrs-full:Cash | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r11.c0 | Cash equivalents [abstract]/lbl30457 | ifrs-full:CashEquivalentsAbstract | xbrli:stringItemType | duration | xs:date('2020-12-31') |
| r12.c0 | Short-term deposits, classified as cash equivalents/lbl30457 | ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r13.c0 | Short-term investments, classified as cash equivalents/lbl30457 | ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r14.c0 | Other banking arrangements, classified as cash equivalents/lbl30457 | ifrs-full:BankingArrangementsClassifiedAsCashEquivalents | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r15.c0 | Cash equivalents/lbl30457 | ifrs-full:CashEquivalents | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r16.c0 | Other cash and cash equivalents/lbl30457 | ifrs-full:OtherCashAndCashEquivalents | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r17.c0 | Cash and cash equivalents/lbl30457 | ifrs-full:CashAndCashEquivalents | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r18.c0 | Borrowings [abstract]/lbl30457 | ifrs-full:BorrowingsAbstract | xbrli:stringItemType | duration | xs:date('2020-12-31') |
| r19.c0 | Non-current portion of non-current borrowings/lbl30457 | ifrs-full:LongtermBorrowings | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r20.c0 | Current borrowings and current portion of non-current borrowings [abstract]/lbl30457 | ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowingsAbstract | xbrli:stringItemType | duration | xs:date('2020-12-31') |
| r21.c0 | Current borrowings/lbl30457 | ifrs-full:ShorttermBorrowings | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r22.c0 | Current portion of non-current borrowings/lbl30457 | ifrs-full:CurrentPortionOfLongtermBorrowings | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r23.c0 | Current borrowings and current portion of non-current borrowings/lbl30457 | ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |
| r24.c0 | Borrowings/lbl30457 | ifrs-full:Borrowings | xbrli:monetaryItemType | instant | xs:date('2020-12-31') |