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Expenses by Nature - Summary of Expenses by Cost of Sales (Detail) - TRY (₺) ₺ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Summary of expenses by nature cost of sales [Line Items] |  |  |
Cost of sales net | ₺ (11,073,465) | ₺ (9,166,384) | ₺ (7,769,483)
Cost of sales net | (11,350,174) | (9,236,607) | (7,769,483)
Treasury share [member] |  |  |
Summary of expenses by nature cost of sales [Line Items] |  |  |
Cost of sales net | (1,669,807) | (1,491,503) | (1,418,683)
Accumulated amortization [member] |  |  |
Summary of expenses by nature cost of sales [Line Items] |  |  |
Cost of sales net | (2,596,980) | (2,203,351) | (1,667,750)
Interconnection and Termination Cost [member] |  |  |
Summary of expenses by nature cost of sales [Line Items] |  |  |
Cost of sales net | (1,607,079) | (1,420,233) | (1,326,990)
Radio Cost [member] |  |  |
Summary of expenses by nature cost of sales [Line Items] |  |  |
Cost of sales net | (1,123,668) | (1,057,618) | (911,454)
Employee benefit expense [member] |  |  |
Summary of expenses by nature cost of sales [Line Items] |  |  |
Cost of sales net | (1,046,544) | (859,143) | (734,725)
Cost of goods sold [member] |  |  |
Summary of expenses by nature cost of sales [Line Items] |  |  |
Cost of sales net | (870,226) | (551,656) | (250,779)
Direct cost of revenue from financial services [member] |  |  |
Summary of expenses by nature cost of sales [Line Items] |  |  |
Cost of sales net | (270,366) | (68,546) |
Universal service fund [member] |  |  |
Summary of expenses by nature cost of sales [Line Items] |  |  |
Cost of sales net | (221,431) | (192,045) | (182,508)
Transmission costs [member] |  |  |
Summary of expenses by nature cost of sales [Line Items] |  |  |
Cost of sales net | (218,221) | (139,185) | (113,574)
Roaming expenses [member] |  |  |
Summary of expenses by nature cost of sales [Line Items] |  |  |
Cost of sales net | (177,258) | (128,429) | (108,102)
Billing and archiving cost [member] |  |  |
Summary of expenses by nature cost of sales [Line Items] |  |  |
Cost of sales net | (55,185) | (61,647) | (55,056)
Other [member] |  |  |
Summary of expenses by nature cost of sales [Line Items] |  |  |
Cost of sales net | ₺ (1,493,409) | ₺ (1,063,251) | ₺ (999,862)

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- Definition The amount of costs relating to expenses directly or indirectly attributed to the goods or services sold, which may include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, unallocated production overheads and abnormal amounts of production costs of inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_99&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 103 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_103&doctype=Standard -URIDate 2017-03-09 + Details
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