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Segment Information - Summary of Geographical Information (Detail) - TRY (₺)
₺ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of geographical areas [line items]      
Total revenue ₺ 17,632,064 ₺ 14,285,561 ₺ 12,769,415
Non-current assets 19,913,363 18,249,312  
Turkey [member]      
Disclosure of geographical areas [line items]      
Total revenue 16,431,863 13,321,503 11,779,345
Non-current assets 18,098,228 16,548,162  
Ukraine [member]      
Disclosure of geographical areas [line items]      
Total revenue 664,643 573,951 571,630
Non-current assets 1,408,783 1,211,789  
Belarus [member]      
Disclosure of geographical areas [line items]      
Total revenue 209,884 149,005 141,219
Non-current assets 138,371 291,498  
Azerbaijan [member]      
Disclosure of geographical areas [line items]      
Total revenue 174,021 108,329 145,654
Non-current assets 13,663 13,563  
Turkish Republic of Northern Cyprus [member]      
Disclosure of geographical areas [line items]      
Total revenue 148,637 129,785 125,668
Non-current assets 141,802 117,243  
Germany [member]      
Disclosure of geographical areas [line items]      
Total revenue 3,016 2,988 ₺ 5,899
Non-current assets ₺ 112,516 ₺ 67,057