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Basis of Preparation and Summary of Significant Accounting Policies - Summary of Reclassification of Financial Instruments on the Date of Initial Application (Detail) - TRY (₺) ₺ in Thousands | Dec. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
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Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Derivatives | ₺ 165,265 |  | ₺ 110,108 |  |
Trade receivables | 115,001 |  | 155,634 |  |
Receivables from financial services | 884,686 |  | 1,297,597 |  |
Held to maturity investments |  |  | 654 |  |
Trade receivables | 2,505,990 |  | 2,848,572 |  |
Due from related parties | 13,533 |  | 5,299 |  |
Receivables from financial services | 3,286,243 |  | 2,950,523 |  |
Cash and cash equivalents | 7,419,239 |  | 4,712,333 | ₺ 6,052,352 | ₺ 2,918,796
Held to maturity investments |  |  | 11,338 |  |
Derivatives | ₺ 1,356,062 |  | ₺ 981,396 |  |
Application of IFRS9 [member] | Financial assets at amortised cost [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Trade receivables |  | ₺ 154,392 |  |  |
Receivables from financial services |  | 1,297,597 |  |  |
Held to maturity investments |  | 654 |  |  |
Trade receivables |  | 2,888,862 |  |  |
Due from related parties |  | 5,522 |  |  |
Receivables from financial services |  | 2,897,572 |  |  |
Cash and cash equivalents |  | 4,711,452 |  |  |
Held to maturity investments |  | 11,332 |  |  |
Application of IFRS9 [member] | Financial assets at fair value through profit or loss, category [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Derivatives |  | 981,396 |  |  |
Application of IFRS9 [member] | Financial liabilities at fair value through profit or loss [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Derivatives |  | 110,108 |  |  |
Increase (decrease) due to application of IFRS 9 [member] | Financial assets at amortised cost [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Trade receivables |  | (1,242) |  |  |
Trade receivables |  | 40,290 |  |  |
Due from related parties |  | 223 |  |  |
Receivables from financial services |  | (52,951) |  |  |
Cash and cash equivalents |  | (881) |  |  |
Held to maturity investments |  | (6) |  |  |
IAS 39 [member] | Financial assets at amortised cost [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Trade receivables |  | 155,634 |  |  |
Receivables from financial services |  | 1,297,597 |  |  |
Trade receivables |  | 2,848,572 |  |  |
Due from related parties |  | 5,299 |  |  |
Receivables from financial services |  | 2,950,523 |  |  |
Cash and cash equivalents |  | 4,712,333 |  |  |
IAS 39 [member] | Financial assets at fair value through profit or loss, category [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Derivatives |  | 981,396 |  |  |
IAS 39 [member] | Held to maturity investments [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Held to maturity investments |  | 654 |  |  |
Held to maturity investments |  | 11,338 |  |  |
IAS 39 [member] | Financial liabilities at fair value through profit or loss [member] |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |
Derivatives |  | ₺ 110,108 |  |  |

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