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Revenue - Summary of Revenue (Detail) - TRY (₺)
₺ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of revenue [line items]      
Telecommunication Services ₺ 17,977,697 ₺ 15,115,816 ₺ 12,883,974
Equipment revenues 1,438,845 1,159,500 624,352
Revenue from financial services 941,918 605,663 184,698
Call center revenues 203,172 232,679 198,564
Commission fees on betting business 200,315 181,886 176,167
Revenue from betting business 268,470 174,021 108,329
Other 262,058 162,499 109,477
Total revenue 21,292,475 17,632,064 14,285,561
Operating segments [member] | Turkcell Turkey segment [member]      
Disclosure of revenue [line items]      
Telecommunication Services 16,752,587 14,236,174 12,126,395
Equipment revenues 1,337,495 1,089,699 579,820
Other 175,695 124,263 81,377
Total revenue 18,265,777 15,450,136 12,787,592
Operating segments [member] | Turkcell International segment [member]      
Disclosure of revenue [line items]      
Telecommunication Services 1,281,595 952,246 796,225
Equipment revenues 101,350 69,801 44,532
Call center revenues 9,763 7,706 7,084
Other 64,272 37,325 26,851
Total revenue 1,456,980 1,067,078 874,692
Operating segments [member] | All other segments [member]      
Disclosure of revenue [line items]      
Revenue from financial services 941,918 605,663 184,698
Call center revenues 211,195 224,973 191,480
Commission fees on betting business 200,315 181,886 176,167
Revenue from betting business 268,470 174,021 108,329
Other 311,933 911 1,249
Total revenue 1,933,831 1,187,454 661,923
Intersegment eliminations [member]      
Disclosure of revenue [line items]      
Telecommunication Services 56,485 72,604 38,646
Call center revenues 17,786    
Other 289,842    
Total revenue ₺ 364,113 ₺ 72,604 ₺ 38,646