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v3.19.1

Cash and Cash Equivalents - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Cash and cash equivalents1 [line items] |  |
Average maturity of time deposits | 35 days | 32 days
TL [member] |  |
Cash and cash equivalents1 [line items] |  |
Effective interest rate | 22.50% | 14.30%
USD [member] |  |
Cash and cash equivalents1 [line items] |  |
Effective interest rate | 5.90% | 5.80%
EUR [member] |  |
Cash and cash equivalents1 [line items] |  |
Effective interest rate | 3.30% | 2.20%

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- Definition Average maturity of time deposits. + References No definition available. + Details
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Namespace Prefix: | tkc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Cash and cash equivalents1 [line items]. + References No definition available. + Details
Name: | tkc_CashAndCashEquivalents1LineItems
Namespace Prefix: | tkc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Effective interest rate. + References No definition available. + Details
Name: | tkc_EffectiveInterestRate
Namespace Prefix: | tkc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | srt_CurrencyAxis=currency_TRY
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_CurrencyAxis=currency_USD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_CurrencyAxis=currency_EUR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |