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Income Tax Expense - Summary of Income Tax Expense (Detail) - TRY (₺)
₺ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Major components of tax expense (income) [abstract]      
Current income tax expense ₺ (724,688) ₺ (570,509) ₺ (654,953)
Deferred income tax credit/(expense) 337,495 (215,121) 159,472
Total income tax expense ₺ (387,193) ₺ (785,630) ₺ (495,481)