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Segment Information - Reconciliation of Adjusted EBITDA to Consolidated Profit Before Income Tax and Profit (Detail) - TRY (₺)
₺ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of operating segments [line items]      
Total revenue ₺ 25,137,135 ₺ 21,292,475 ₺ 17,632,064
Adjusted EBITDA 10,426,419 8,787,982 6,228,254
Net impairment (losses)/gains on financial and contract assets (338,857) (346,390) (36,278)
Profit for the year 3,276,690 2,177,335 2,037,759
(Profit)/loss from discontinued operations (772,436)    
Profit from continuing operations 2,504,254 2,177,335 2,037,759
Income tax expense 785,630 495,481 571,758
Finance income (297,450) (1,677,114) (597,246)
Finance costs 2,025,118 3,364,072 920,112
Other income (140,705) (241,435) (74,438)
Other expenses 487,295 381,582 773,329
Depreciation and amortization 5,046,565 4,287,974 2,596,980
Share of loss of equity accounted investees 15,712 87  
Consolidated adjusted EBITDA 10,426,419 8,787,982 6,228,254
Turkcell Turkey segment [member]      
Disclosure of operating segments [line items]      
Total revenue 21,407,838 18,046,231 15,309,109
Turkcell International segment [member]      
Disclosure of operating segments [line items]      
Total revenue 1,908,086 1,387,323 1,026,181
All other segments [member]      
Disclosure of operating segments [line items]      
Total revenue 1,821,211 1,858,921 1,296,774
Segment revenue [member]      
Disclosure of operating segments [line items]      
Total revenue 25,137,135 21,292,475 17,632,064
Operating segments [member] | Turkcell Turkey segment [member]      
Disclosure of operating segments [line items]      
Total revenue 21,487,156 18,092,586  
Adjusted EBITDA 8,789,179 7,403,822 5,504,124
Net impairment (losses)/gains on financial and contract assets (223,879) (248,171) 49,468
Consolidated adjusted EBITDA 8,789,179 7,403,822 5,504,124
Operating segments [member] | Turkcell International segment [member]      
Disclosure of operating segments [line items]      
Total revenue 2,002,789 1,456,980  
Adjusted EBITDA 903,896 612,697 263,962
Net impairment (losses)/gains on financial and contract assets (5,109) (4,088) (6,070)
Consolidated adjusted EBITDA 903,896 612,697 263,962
Operating segments [member] | All other segments [member]      
Disclosure of operating segments [line items]      
Total revenue 2,217,979 2,113,681  
Adjusted EBITDA 765,798 801,687 467,580
Net impairment (losses)/gains on financial and contract assets (109,869) (94,131) (79,676)
Consolidated adjusted EBITDA 765,798 801,687 467,580
Operating segments [member] | Segment revenue [member] | Turkcell Turkey segment [member]      
Disclosure of operating segments [line items]      
Total revenue 21,487,156 18,092,586 15,340,866
Operating segments [member] | Segment revenue [member] | Turkcell International segment [member]      
Disclosure of operating segments [line items]      
Total revenue 2,002,789 1,456,980 1,067,078
Operating segments [member] | Segment revenue [member] | All other segments [member]      
Disclosure of operating segments [line items]      
Total revenue 2,217,979 2,113,681 1,297,545
Operating segments [member] | Inter-segment revenue [member] | Turkcell Turkey segment [member]      
Disclosure of operating segments [line items]      
Total revenue (79,318) (46,355) (31,757)
Operating segments [member] | Inter-segment revenue [member] | Turkcell International segment [member]      
Disclosure of operating segments [line items]      
Total revenue (94,703) (69,657) (40,897)
Operating segments [member] | Inter-segment revenue [member] | All other segments [member]      
Disclosure of operating segments [line items]      
Total revenue (396,768) (254,760) (771)
Intersegment eliminations [member]      
Disclosure of operating segments [line items]      
Total revenue (570,789) (370,772)  
Adjusted EBITDA (32,454) (30,224) (7,412)
Consolidated adjusted EBITDA (32,454) (30,224) (7,412)
Intersegment eliminations [member] | Segment revenue [member]      
Disclosure of operating segments [line items]      
Total revenue (570,789) (370,772) (73,425)
Intersegment eliminations [member] | Inter-segment revenue [member]      
Disclosure of operating segments [line items]      
Total revenue ₺ 570,789 ₺ 370,772 ₺ 73,425