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Financial Instruments - Summary of Maximum Exposure to Credit Risk for Trade and Subscriber Receivables, Other Assets and Cash and Cash Equivalent Arising from Sales Transactions Including those Classified as Due from Related Parties (Detail) - TRY (₺) ₺ in Thousands | Dec. 31, 2018 | Jan. 01, 2018
--- | --- | ---
Contract assets [member] | Cost [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for contract assets | ₺ 715,441 | ₺ 514,223
Contract assets [member] | Loss allowance [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for contract assets | 7,370 | 5,128
Other assets [member] | Cost [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 10,426,236 | 7,580,657
Other assets [member] | Loss allowance [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 730,811 | 661,928
Not past due [member] | Contract assets [member] | Cost [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for contract assets | 715,441 | 514,223
Not past due [member] | Contract assets [member] | Loss allowance [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for contract assets | 7,370 | 5,128
Not past due [member] | Other assets [member] | Cost [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 8,656,954 | 6,021,990
Not past due [member] | Other assets [member] | Loss allowance [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 24,864 | 24,936
More Than 30 Days Past Due [member] | Other assets [member] | Cost [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 214,351 | 194,517
More Than 30 Days Past Due [member] | Other assets [member] | Loss allowance [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 4,567 | 6,136
More Than 60 Days Past Due [member] | Other assets [member] | Cost [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 80,762 | 81,804
More Than 60 Days Past Due [member] | Other assets [member] | Loss allowance [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 5,238 | 5,662
More Than 90 Days Past Due [member] | Other assets [member] | Cost [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 57,761 | 35,799
More Than 90 Days Past Due [member] | Other assets [member] | Loss allowance [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 4,900 | 4,279
More Than 120 Days Past Due [member] | Other assets [member] | Cost [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 43,038 | 52,851
More Than 120 Days Past Due [member] | Other assets [member] | Loss allowance [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 6,368 | 9,766
More Than 150 Days Past Due [member] | Other assets [member] | Cost [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 25,543 | 20,493
More Than 150 Days Past Due [member] | Other assets [member] | Loss allowance [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 6,028 | 7,076
More Than150 Days -3 years Past Due [member] | Other assets [member] | Cost [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 755,982 | 823,359
More Than150 Days -3 years Past Due [member] | Other assets [member] | Loss allowance [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 214,893 | 323,124
More Than 3 - 4 years Past Due [member] | Other assets [member] | Cost [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 272,547 | 208,127
More Than 3 - 4 years Past Due [member] | Other assets [member] | Loss allowance [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 182,431 | 158,198
More Than 4 - 5 years Past Dues [member] | Other assets [member] | Cost [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | 319,298 | 141,717
More Than 4 - 5 years Past Dues [member] | Other assets [member] | Loss allowance [member] |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |
Risk for trade and subscriber receivables, other assets and cash and cash equivalent | ₺ 281,522 | ₺ 122,751

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