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Intangible assets - Summary of Intangible Assets and Goodwill (Detail) - TRY (₺) ₺ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | ₺ 84,478,038 | ₺ 88,791,120
Additions net of amortization | (3,461,095) | (350,780)
Disposals | (71,298) | (326,526)
Transfers | (35,890) | 755,315
Asset held for sale |  | (4,764,217)
Impairment (expenses)/reversals | (118,947) | (33,741)
Effects of movements in exchange rates | 1,081,554 | 406,867
Balance at end of year | 81,872,362 | 84,478,038
Cost |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | 310,721,736 | 295,182,566
Additions | 18,615,188 | 24,679,035
Disposals | (99,806) | (715,712)
Transfers | (35,890) | 755,315
Asset held for sale |  | (10,230,635)
Impairment (expenses)/reversals |  | (10,361)
Effects of movements in exchange rates | 1,207,823 | 1,061,528
Balance at end of year | 330,409,051 | 310,721,736
Cost | Telecommunication licenses |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | 98,620,686 | 101,284,877
Additions | 1,026 | 5,216,431
Disposals | (62,746) | (86,334)
Transfers |  | 262,501
Asset held for sale |  | (7,434,755)
Effects of movements in exchange rates | 14,376 | (622,034)
Balance at end of year | 98,573,342 | 98,620,686
Cost | Computer software |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | 149,697,122 | 138,268,118
Additions | 10,551,603 | 11,418,517
Disposals | (32,933) | (250,178)
Transfers | 292,253 | 654,440
Asset held for sale |  | (1,963,228)
Effects of movements in exchange rates | 888,707 | 1,569,453
Balance at end of year | 161,396,752 | 149,697,122
Cost | Transmission line software |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | 1,520,659 | 1,488,153
Additions | 1,119 | 1,403
Disposals | (506) | (5,325)
Effects of movements in exchange rates | 17,288 | 36,428
Balance at end of year | 1,538,560 | 1,520,659
Cost | Indefeasible right of usage |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | 1,466,364 | 1,462,116
Additions | 110,686 | 4,249
Effects of movements in exchange rates |  | (1)
Balance at end of year | 1,577,050 | 1,466,364
Cost | Brand name |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | 15,547 | 16,303
Additions |  | 77
Disposals |  | (71)
Transfers |  | 271
Asset held for sale |  | (886)
Effects of movements in exchange rates | (3,402) | (147)
Balance at end of year | 12,145 | 15,547
Cost | Customer base |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | 56,445 | 70,698
Effects of movements in exchange rates | (6,764) | (14,253)
Balance at end of year | 49,681 | 56,445
Cost | Goodwill |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | 588,963 | 606,037
Impairment (expenses)/reversals |  | (10,361)
Effects of movements in exchange rates |  | (6,713)
Balance at end of year | 588,963 | 588,963
Cost | Subscriber acquisition cost |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | 55,611,955 | 49,237,523
Additions | 7,374,968 | 7,263,978
Disposals |  | (180,615)
Asset held for sale |  | (830,279)
Effects of movements in exchange rates | 337,050 | 121,348
Balance at end of year | 63,323,973 | 55,611,955
Cost | Electricity production license |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | 964,442 | 1,024,900
Effects of movements in exchange rates | (93,340) | (60,458)
Balance at end of year | 871,102 | 964,442
Cost | Others |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | 1,800,954 | 1,614,237
Additions | 282,042 | 238,131
Disposals | (1,989) | (1,242)
Transfers | (35,890) | (33,294)
Asset held for sale |  | (232)
Effects of movements in exchange rates | 68,348 | (16,646)
Balance at end of year | 2,113,465 | 1,800,954
Cost | Construction in progress |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | 378,599 | 109,604
Additions | 293,744 | 536,249
Disposals | (1,632) | (191,947)
Transfers | (292,253) | (128,603)
Asset held for sale |  | (1,255)
Effects of movements in exchange rates | (14,440) | 54,551
Balance at end of year | 364,018 | 378,599
Accumulated depreciation, amortization and impairment |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | (226,243,698) | (206,391,446)
Additions - amortization | (22,076,283) | (25,029,815)
Disposals | 28,508 | 389,186
Asset held for sale |  | 5,466,418
Impairment (expenses)/reversals | (118,947) | (23,380)
Effects of movements in exchange rates | (126,269) | (654,661)
Balance at end of year | (248,536,689) | (226,243,698)
Accumulated depreciation, amortization and impairment | Telecommunication licenses |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | (69,428,856) | (68,226,836)
Additions - amortization | (5,688,680) | (6,172,793)
Disposals | 14,921 | 6,881
Asset held for sale |  | 4,611,507
Effects of movements in exchange rates | (159,167) | 352,385
Balance at end of year | (75,261,782) | (69,428,856)
Accumulated depreciation, amortization and impairment | Computer software |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | (115,515,868) | (105,290,313)
Additions - amortization | (8,552,534) | (9,277,415)
Disposals | 10,454 | 195,150
Asset held for sale |  | 295,352
Impairment (expenses)/reversals | (118,174) | (22,691)
Effects of movements in exchange rates | (534,620) | (1,415,951)
Balance at end of year | (124,710,742) | (115,515,868)
Accumulated depreciation, amortization and impairment | Transmission line software |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | (1,506,223) | (1,465,803)
Additions - amortization | (32,121) | (37,976)
Disposals |  | 5,325
Effects of movements in exchange rates | (13,617) | (7,769)
Balance at end of year | (1,551,961) | (1,506,223)
Accumulated depreciation, amortization and impairment | Indefeasible right of usage |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | (927,884) | (837,147)
Additions - amortization | (74,573) | (91,395)
Disposals | 1,369 |
Effects of movements in exchange rates | 810 | 658
Balance at end of year | (1,000,278) | (927,884)
Accumulated depreciation, amortization and impairment | Brand name |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | (14,170) | (23,840)
Additions - amortization |  | (94)
Disposals |  | 30
Asset held for sale |  | 491
Effects of movements in exchange rates | 11,395 | 9,243
Balance at end of year | (2,775) | (14,170)
Accumulated depreciation, amortization and impairment | Customer base |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | (40,920) | (50,607)
Additions - amortization | (631) | (2,895)
Effects of movements in exchange rates | 15,568 | 12,582
Balance at end of year | (25,983) | (40,920)
Accumulated depreciation, amortization and impairment | Subscriber acquisition cost |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | (37,496,661) | (29,407,136)
Additions - amortization | (7,460,472) | (9,214,832)
Disposals |  | 180,615
Asset held for sale |  | 558,856
Effects of movements in exchange rates | 537,653 | 385,836
Balance at end of year | (44,419,480) | (37,496,661)
Accumulated depreciation, amortization and impairment | Electricity production license |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | (75,717) | (14,348)
Additions - amortization | (43,678) | (43,555)
Effects of movements in exchange rates | (17,972) | (17,814)
Balance at end of year | (137,367) | (75,717)
Accumulated depreciation, amortization and impairment | Others |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Balance at beginning of year | (1,237,399) | (1,075,416)
Additions - amortization | (223,594) | (188,860)
Disposals | 1,764 | 1,185
Asset held for sale |  | 212
Impairment (expenses)/reversals | (773) | (689)
Effects of movements in exchange rates | 33,681 | 26,169
Balance at end of year | ₺ (1,426,321) | ₺ (1,237,399)

X
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