Financial assets - Gain losses on other comprehensive income (Details) - TRY (₺) ₺ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Gains / (Losses) recognized in other comprehensive income
Gains / (Losses) recognized in other comprehensive income	₺ (1,487)	₺ 3,472
Debt securities [member]
Gains / (Losses) recognized in other comprehensive income
Gains / (Losses) recognized in other comprehensive income	₺ (1,487)	₺ 3,472

The gains (losses) recognised in other comprehensive income on financial assets measured at fair value through other comprehensive income, net of tax. [Refer: Financial assets measured at fair value through other comprehensive income; Other comprehensive income]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 91
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_91_a&doctype=Standard
-URIDate 2020-01-01

Name:	ifrs-full_GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration