Deferred Tax Assets and Liabilities - Summary of Recognized Deferred Tax Assets and Liabilities (Detail) - TRY (₺) ₺ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	₺ 802,550	₺ 835,176
Offsetting	(649,818)	(739,116)
Net deferred tax assets/ (liabilities)	152,732	96,060
Deferred tax liabilities	(1,512,178)	(1,390,238)
Offsetting	649,818	739,116
Net deferred tax assets/ (liabilities)	(862,360)	(651,122)
Net deferred tax asset/liabilities	(709,628)	(555,062)
Offsetting	0	0
Net deferred tax assets/(liabilities)	(709,628)	(555,062)
Property, plant & equipment and intangible assets [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	106,128	41,903
Deferred tax liabilities	(936,167)	(680,134)
Net deferred tax asset/liabilities	(830,039)	(638,231)
Investment [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	32,926	32,926
Net deferred tax asset/liabilities	32,926	32,926
Derivative instruments [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	15,380	1,492
Deferred tax liabilities	(429,162)	(182,806)
Net deferred tax asset/liabilities	(413,782)	(181,314)
Reserve for employee termination benefits and provisions [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	155,132	202,112
Deferred tax liabilities	(45,581)	(64)
Net deferred tax asset/liabilities	109,551	202,048
Assets classified as held for sale [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax liabilities		(92,327)
Net deferred tax asset/liabilities		(92,327)
Tax credit carry forwards (investment tax credit) [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	224,179
Net deferred tax asset/liabilities	224,179
Tax allowance [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	20,554	10,775
Net deferred tax asset/liabilities	20,554	10,775
Other items [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred tax assets	248,251	545,968
Deferred tax liabilities	(101,268)	(434,907)
Net deferred tax asset/liabilities	₺ 146,983	₺ 111,061

The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2018-01-01
-Paragraph 81
-Subparagraph g
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_g_i&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 54
-Subparagraph o
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_o&doctype=Standard
-URIDate 2018-03-16

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 56
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_56&doctype=Standard
-URIDate 2018-03-16

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- Definition

The amounts of income taxes payable in future periods in respect of taxable temporary differences. [Refer: Temporary differences [member]]

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- Definition

The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets]

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The amount of deferred tax assets net of deferred tax liabilities, when the absolute amount of deferred tax assets is greater than the absolute amount of deferred tax liabilities. [Refer: Deferred tax assets; Deferred tax liabilities]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The amount of deferred tax liabilities net of deferred tax assets, when the absolute amount of deferred tax liabilities is greater than the absolute amount of deferred tax assets. [Refer: Deferred tax assets; Deferred tax liabilities]

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Deferred tax asset offsetting deferred tax liabilities.

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Net deferred tax liability (asset).

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Offsetting deferred tax assets (liabilities) and deferred tax (liabilities) assets.

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