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Expenses by Nature - Summary of Expenses by Cost of Sales (Detail) - TRY (₺)
₺ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Summary of expenses by nature cost of sales [line items]      
Cost of sales net ₺ (17,083,480) ₺ (14,145,993) ₺ (11,350,174)
Cost of sales net (17,083,480) (14,145,993) (11,350,174)
Treasury shares [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (2,191,427) (1,884,556) (1,669,807)
Accumulated amortization [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (5,046,565) (4,287,974) (2,596,980)
Interconnection and termination cost [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (1,909,614) (1,763,414) (1,607,079)
Employee benefit expense [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (1,501,617) (1,193,953) (1,041,755)
Cost of goods sold [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (2,278,283) (1,284,180) (965,054)
Radio cost [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (734,583) (508,884) (844,941)
Direct cost of revenue from financial services [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (240,297) (378,477) (283,000)
Transmission costs [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (335,980) (326,080) (218,221)
Universal service fund [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (297,053) (256,454) (221,431)
Roaming expenses [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (238,147) (226,806) (177,258)
Billing and archiving cost [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (48,970) (50,929) (55,185)
Frequency Cost [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (802,950) (622,390) (278,727)
Other [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net ₺ (1,457,994) ₺ (1,361,896) ₺ (1,390,736)