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Derivative Financial Instruments - Additional Information (Detail)
₺ in Thousands, € in Thousands
 12 Months Ended
Dec. 31, 2019
EUR (€)
Dec. 31, 2018
TRY (₺)
Dec. 31, 2019
TRY (₺)
Dec. 31, 2019
EUR (€)
Dec. 31, 2018
EUR (€)
Disclosure of detailed information about financial instruments [line items]          
Interest expense accrual included in current derivative financial instruments assets   ₺ 84,479 ₺ 81,815    
Derivative financial assets   1,356,062 845,513    
Interest expense accrual included in current derivative financial instruments liabilities   34,168 14,078    
Derivative financial liabilities   165,265 86,617    
Derivative financial assets used for hedging | €         € 489,404
Guarantees included in current derivative financial instruments assets used for hedging   833,786      
Maximum exposure to credit risk   16,635,383 ₺ 18,208,078 € 433,400  
Transfer amount as collateral to the bank € 99,473 661,555      
Collateral amount recognizes under borrowings   833,786      
Change in percentage foreign exchange currency rate 10.00%        
Participating cross currency swap contracts [member]          
Disclosure of detailed information about financial instruments [line items]          
Guarantees included in current derivative financial instruments assets used for hedging   690,146     € 500,000
Maximum exposure to credit risk | €       € 56,004  
Transfer amount as collateral to the company € 224,843 1,495,341      
Derivative financial instruments assets, without transaction   1,679,299      
Current borrowings, without transaction   ₺ 8,462,119      
USD [member] | Currency risk [member]          
Disclosure of detailed information about financial instruments [line items]          
Hedge Ratio 1 1      
USD [member] | Interest rate risk [member]          
Disclosure of detailed information about financial instruments [line items]          
Hedge Ratio 1 1      
Other foreign currency (RMB) [member] | Currency risk [member]          
Disclosure of detailed information about financial instruments [line items]          
Hedge Ratio   1      
Other foreign currency (RMB) [member] | Interest rate risk [member]          
Disclosure of detailed information about financial instruments [line items]          
Hedge Ratio   1