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Revenue - Summary of Revenue by Recognition (Detail) - TRY (₺)
₺ in Thousands
 12 Months Ended
Jan. 01, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of revenue [line items]        
Telecommunication Services   ₺ 20,878,303 ₺ 17,859,757 ₺ 15,041,058
Equipment Related   2,246,040 1,311,095 1,103,448
Call Center   312,443 203,172 232,679
Commission fees on betting business   132,300 200,315 181,886
Revenue from betting business     268,470 174,021
Revenue from financial operations   1,140,873 1,119,121 715,000
All other segments   427,176 330,545 183,972
Total   25,137,135 21,292,475 17,632,064
Turkcell Turkey segment [member]        
Disclosure of revenue [line items]        
Total   21,407,838 18,046,231 15,309,109
Turkcell International segment [member]        
Disclosure of revenue [line items]        
Total   1,908,086 1,387,323 1,026,181
All other segments [member]        
Disclosure of revenue [line items]        
Total   1,821,211 1,858,921 1,296,774
Goods or services transferred at point in time [member]        
Disclosure of revenue [line items]        
Telecommunication Services   209,289 91,020  
Equipment Related   2,165,960 1,304,408  
Revenue from financial operations   222,091 251,736  
All other segments   58,675 158,636  
Total   2,656,015 1,805,800  
Goods or services transferred over time [member]        
Disclosure of revenue [line items]        
Telecommunication Services   20,669,014 17,768,737  
Equipment Related   80,080 6,687  
Call Center   312,443 203,172  
Commission fees on betting business   132,300 200,315  
Revenue from betting business     268,470  
Revenue from financial operations   918,782 867,385  
All other segments   368,501 171,909  
Total   22,481,120 19,486,675  
Operating segments [member] | Turkcell Turkey segment [member]        
Disclosure of revenue [line items]        
Telecommunication Services   19,157,657 16,636,497 14,159,955
Equipment Related   2,130,135 1,209,745 1,033,647
Call Center ₺ 12,954 21,851 12,954 8,395
All other segments   177,513 233,390 138,869
Total   21,487,156 18,092,586  
Operating segments [member] | Turkcell International segment [member]        
Disclosure of revenue [line items]        
Telecommunication Services   1,780,793 1,281,595 952,246
Equipment Related   115,905 101,350 69,801
Call Center   17,008 9,763 7,706
All other segments   89,083 64,272 37,325
Total   2,002,789 1,456,980  
Operating segments [member] | All other segments [member]        
Disclosure of revenue [line items]        
Call Center   308,126 211,195 224,973
Commission fees on betting business   132,300 200,315 181,886
Revenue from betting business     268,470 174,021
Revenue from financial operations   1,141,712 1,121,768 715,754
All other segments   635,841 311,933 911
Total   2,217,979 2,113,681  
Operating segments [member] | Goods or services transferred at point in time [member] | Turkcell Turkey segment [member]        
Disclosure of revenue [line items]        
Telecommunication Services   198,734 102,524  
Equipment Related   2,050,055 1,203,058  
All other segments   37,726 142,504  
Total   2,286,515 1,448,086  
Operating segments [member] | Goods or services transferred at point in time [member] | Turkcell International segment [member]        
Disclosure of revenue [line items]        
Telecommunication Services   10,555    
Equipment Related   115,905 101,350  
All other segments   19,300 8,556  
Total   145,760 109,906  
Operating segments [member] | Goods or services transferred at point in time [member] | All other segments [member]        
Disclosure of revenue [line items]        
Revenue from financial operations   222,930 254,383  
All other segments   2,306 7,576  
Total   225,236 261,959  
Operating segments [member] | Goods or services transferred over time [member] | Turkcell Turkey segment [member]        
Disclosure of revenue [line items]        
Telecommunication Services   18,958,923 16,533,973  
Equipment Related   80,080 6,687  
Call Center   21,851 12,954  
All other segments   139,787 90,886  
Total   19,200,641 16,644,500  
Operating segments [member] | Goods or services transferred over time [member] | Turkcell International segment [member]        
Disclosure of revenue [line items]        
Telecommunication Services   1,770,238 1,281,595  
Call Center   17,008 9,763  
All other segments   69,783 55,716  
Total   1,857,029 1,347,074  
Operating segments [member] | Goods or services transferred over time [member] | All other segments [member]        
Disclosure of revenue [line items]        
Call Center   308,126 211,195  
Commission fees on betting business   132,300 200,315  
Revenue from betting business     268,470  
Revenue from financial operations   918,782 867,385  
All other segments   633,535 304,357  
Total   1,992,743 1,851,722  
Intersegment eliminations [member]        
Disclosure of revenue [line items]        
Telecommunication Services   (60,147) (58,335) (71,143)
Call Center   (34,542) (30,740) (8,395)
Revenue from financial operations   (839) (2,647) (754)
All other segments   (475,261) (279,050) ₺ 6,867
Total   (570,789) (370,772)  
Intersegment eliminations [member] | Goods or services transferred at point in time [member]        
Disclosure of revenue [line items]        
Telecommunication Services     (11,504)  
Revenue from financial operations   (839) (2,647)  
All other segments   (657)    
Total   (1,496) (14,151)  
Intersegment eliminations [member] | Goods or services transferred over time [member]        
Disclosure of revenue [line items]        
Telecommunication Services   (60,147) (46,831)  
Call Center   (34,542) (30,740)  
All other segments   (474,604) (279,050)  
Total   ₺ (569,293) ₺ (356,621)