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Financial Instruments - Disclosure of credit risk (Detail) - TRY (₺)
₺ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk ₺ 13,279,196 ₺ 12,463,993
Trade receivables [member]    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 3,004,206 3,525,297
Receivables from financial services [member]    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 4,248,120 2,396,372
Cash and cash equivalents [member]    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 4,712,141 6,052,129
Participating cross currency swap and FX swap contracts [member]    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 981,396 390,958
Other current assets [member]    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 316,042 93,376
Held-to-maturity investments, category [member]    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 11,992  
Due from related parties [member]    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk ₺ 5,299 ₺ 5,861