Expenses by Nature - Summary of Net Impairment Losses on Financial and Contract Assets (Detail) - TRY (₺) ₺ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of impairment loss and reversal of impairment loss [line items]
Net impairment losses on financial and contract assets	₺ (349,595)	₺ (338,857)	₺ (346,390)
Financial and contract assets [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Net impairment losses on financial and contract assets	₺ (349,595)	₺ (338,857)	₺ (346,390)

The amount of impairment loss, impairment gain or reversal of impairment loss that is recognised in profit or loss in accordance with paragraph 5.5.8 of IFRS 9 and that arises from applying the impairment requirements in Section 5.5 of IFRS 9.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 82
-Subparagraph ba
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_82_ba&doctype=Standard
-URIDate 2020-01-01

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