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Expenses by Nature - Summary of Expenses by Cost of Sales (Detail) - TRY (₺)
₺ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Summary of expenses by nature cost of sales [line items]      
Cost of sales net ₺ (14,145,993) ₺ (11,350,174) ₺ (9,236,607)
Cost of sales net (14,145,993) (11,350,174) (9,236,607)
Treasury shares [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (1,884,556) (1,669,807) (1,491,503)
Accumulated amortization [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (4,287,974) (2,596,980) (2,203,351)
Interconnection and termination cost [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (1,763,414) (1,607,079) (1,420,233)
Employee benefit expense [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (1,202,485) (1,046,544) (859,143)
Cost of goods sold [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (1,108,734) (870,226) (551,656)
Radio cost [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (508,884) (844,941) (828,222)
Direct cost of revenue from financial services [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (348,492) (270,366) (68,546)
Transmission costs [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (326,080) (218,221) (139,185)
Universal service fund [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (256,454) (221,431) (192,045)
Roaming expenses [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (226,806) (177,258) (128,429)
Billing and archiving cost [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (50,929) (55,185) (61,647)
Frequency Cost [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net (622,390) (278,727) (229,396)
Other [member]      
Summary of expenses by nature cost of sales [line items]      
Cost of sales net ₺ (1,558,795) ₺ (1,493,409) ₺ (1,063,251)