Impairment of Assets - Belarusian Telecom - Additional Information (Detail) - Belarusian Telecom [member] - TRY (₺) ₺ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Disclosure of detailed information about intangible assets [line items]
Impairment loss recognized	₺ 228,774
Actuarial assumption of weighted average cost of capital [member]
Disclosure of detailed information about intangible assets [line items]
Percentage of reasonably possible increase in actuarial assumption	0.50%	0.50%
Percentage of reasonably possible decrease in actuarial assumption	(0.50%)	(0.50%)
Individual assets or cash-generating units [member]
Disclosure of detailed information about intangible assets [line items]
Terminal growth rate	5.00%	8.00%
Description on key assumptions	Post-tax WACC rate of 22.8% for the period from 2019 to 2024, a post-tax WACC rate of 22.4% for the period after 2024, and a terminal growth rate of 5.0% were used to extrapolate cash flows beyond the 6-year forecast period based on the business plan.	Post-tax WACC rate of 25.4% for the period from 2018 to 2022, a post-tax WACC rate of 24.9% for the period after 2022, and a terminal growth rate of 8.0% were used to extrapolate cash flows beyond the 5-year forecast period based on the business plan.
Individual assets or cash-generating units [member] \| 2018 to 2022 [member]
Disclosure of detailed information about intangible assets [line items]
Post-tax WACC rate		25.40%
Individual assets or cash-generating units [member] \| After 2021 [member]
Disclosure of detailed information about intangible assets [line items]
Post-tax WACC rate		24.90%
Individual assets or cash-generating units [member] \| 2019 to 2024 [member]
Disclosure of detailed information about intangible assets [line items]
Post-tax WACC rate	22.80%
Individual assets or cash-generating units [member] \| After 2024 [member]
Disclosure of detailed information about intangible assets [line items]
Post-tax WACC rate	22.40%

The growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

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The description of management's approach to determining the value (or values) assigned to key assumptions, whether those value(s) reflect past experience or, if appropriate, are consistent with external sources of information and, if not, how and why they differ from past experience or external sources of information. Key assumptions are those to which the unit’s (group of units’) recoverable amount is most sensitive.

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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The amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]]

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The reasonably possible percentage of the decrease in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [member]]

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The reasonably possible percentage of the increase in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [member]]

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Weighted average cost of capital post tax rate after five years.

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