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Derivative financial instruments (Tables) | 12 Months Ended
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Dec. 31, 2021
Statement [LineItems] |
Summary of Fair Value of Derivative Financial Instruments | The fair value of derivative financial instruments at 31 December 2021 and 2020 are attributable to the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 31 December 2021 | ​ | 31 December 2020
​ |  | Assets |  | Liabilities |  | Assets |  | Liabilities
Held for trading | ​ | 1,181,740 | ​ | — |  | 360,047 |  | 41,132
Derivatives used for hedge accounting | ​ | 999,577 | ​ | 60,518 |  | 642,623 |  | 66,851
Total | ​ | 2,181,317 | ​ | 60,518 |  | 1,002,670 |  | 107,983
​ The notional amount and the fair value of derivatives used for hedging contracts at 31 December 2021 and 2020 are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 31 December 2021 | ​ | 31 December 2020 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Change in | ​ | Change in
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | intrinsic value | ​ | intrinsic value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | of outstanding | ​ | of outstanding
​ | ​ | Notional | ​ | ​ | ​ | Notional | ​ | ​ | ​ | ​ | ​ | ​ | ​ | hedging | ​ | hedging
​ | ​ | value | ​ | ​ | ​ | value | ​ | ​ | ​ | ​ | ​ | ​ | ​ | instruments | ​ | instruments
​ | ​ | in original | ​ | ​ | ​ | in original | ​ | ​ | ​ | ​ | ​ | Hedge | ​ | since 1 | ​ | since 1
Currency |  | currency |  | Fair Value |  | currency |  | Fair Value |  | Maturity date |  | ratio |  | January 2021 |  | January 2020
Participating cross currency swap contracts |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​
EUR Contracts | ​ | 300,200 | ​ | 174,747 | ​ | 366,800 | ​ | 221,937 | ​ | October 2025 | ​ | 01:01 | ​ | 963,374 | ​ | 962,903
EUR Contracts | ​ | 63,365 | ​ | 48,443 | ​ | 65,158 | ​ | 53,142 | ​ | April 2026 | ​ | 01:01 | ​ | 78,593 | ​ | 161,325
USD Contracts | ​ | 206,770 | ​ | 523,571 | ​ | 216,054 | ​ | 270,315 | ​ | April 2026 | ​ | 01:01 | ​ | 533,782 | ​ | 342,123
Cross currency swap contracts |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​
RMB Contracts | ​ | 135,134 | ​ | 235,617 | ​ | 162,121 | ​ | 97,229 | ​ | April 2026 | ​ | 01:01 | ​ | 136,770 | ​ | 46,858
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap contracts | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
USD Contracts | ​ | 150,075 | ​ | (43,319) | ​ | 180,045 | ​ | (66,851) | ​ | April 2026 | ​ | 01:01 | ​ | — | ​ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Derivatives used for hedge accounting |  | ​ | ​ | 939,059 | ​ | ​ | ​ | 575,772 |  | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ EUR 340,220 (2020: EUR 414,812) participating cross currency swap contracts includes TL 1,170,728 (2020: TL 1,121,303) guarantees after the CSA agreement. ​ 36. Derivative financial instruments (continued) Held for trading The notional amount and the fair value of derivatives used held for trading contracts at 31 December 2021 and 2020 are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 31 December 2021 | ​ | 31 December 2020
​ |  | Notional value |  | ​ | ​ | ​ |  | Notional value |  | ​ |  | ​
Currency | ​ | in original currency | ​ | Fair value | ​ | Maturity | ​ | in original currency | ​ | Fair value | ​ | Maturity
Participating cross currency swap contracts | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
EUR Contracts | ​ | 66,700 | ​ | 243,478 | ​ | April 2026 | ​ | 90,881 | ​ | 230,033 | ​ | April 2026
USD Contracts | ​ | 36,000 | ​ | 58,890 | ​ | November 2025 | ​ | 32,008 | ​ | 31,334 | ​ | April 2026
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cross currency swap contracts | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
EUR Contracts | ​ | 24,000 | ​ | 168,900 | ​ | December 2022 | ​ | 7,200 | ​ | 20,853 | ​ | September 2021
USD Contracts | ​ | 36,572 | ​ | 284,868 | ​ | March 2023-November 2025 | ​ | 34,286 | ​ | 62,715 | ​ | March 2023
RMB Contracts | ​ | 32,342 | ​ | 50,842 | ​ | April 2026 | ​ | 38,801 | ​ | 14,535 | ​ | April 2026
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate swap contracts |  | ​ |  | ​ | ​ | ​ |  | ​ | ​ | ​ |  | ​
EUR Contracts | ​ | 35,000 | ​ | 11,780 | ​ | September 2028 | ​ | — | ​ | — | ​ | —
USD Contracts | ​ | — | ​ | — | ​ | — | ​ | 17,778 | ​ | 258 | ​ | September 2028
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
FX swap contracts | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
USD Contracts | ​ | 200,000 | ​ | 193,504 | ​ | January 2022 | ​ | 10,000 | ​ | 319 | ​ | January 2021
​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Currency forward contracts |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
USD Contracts |  | 175,000 | ​ | 169,478 | ​ | January 2022-March 2022 | ​ | — | ​ | — | ​ | —
​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held for trading financial assets | ​ | ​ | ​ | 1,181,740 | ​ | ​ | ​ | ​ | ​ | 360,047 | ​ |
​ ​ 36. Derivative financial instruments (continued) Held for trading (continued) The notional amount and the fair value of derivatives used held for trading contracts at 31 December 2021 and 2020 are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 31 December 2021 | ​ | 31 December 2020
​ | ​ | Notional value | ​ | ​ | ​ | ​ | ​ | Notional value | ​ | ​ | ​ | ​
Currency |  | in original currency |  | Fair value |  | Maturity |  | in original currency |  | Fair value |  | Maturity
Participating cross currency swap contracts |  | ​ |  | ​ | ​ |  |  |  |  |  |  |
USD Contracts | ​ | — | ​ | — | ​ | — | ​ | 45,000 | ​ | (9,701) | ​ | November 2025
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cross currency swap contracts | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
EUR Contracts | ​ | — | ​ | — | ​ | — | ​ | 43,900 | ​ | (13,684) | ​ | December 2021-2022
USD Contracts | ​ | — | ​ | — | ​ | — | ​ | 20,000 | ​ | (6,747) | ​ | November 2025
​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​
Interest rate swap contracts | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
USD Contracts | ​ | — | ​ | — | ​ | — | ​ | 22,222 | ​ | (1,141) | ​ | September 2028
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
FX swap contracts | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
USD Contracts | ​ | — | ​ | — | ​ | — | ​ | 82,735 | ​ | (7,046) | ​ | January 2021
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Currency forward contracts | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
USD Contracts |  | — | ​ | — | ​ | — | ​ | 6,000 | ​ | (2,813) |  | January-December 2021
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held for trading financial liabilities |  | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | (41,132) |  | ​
Summary of Fair Value of Financial Assets and Financial Liabilities | ​
​ | ​ | ​ | ​ | ​
​ |  | Fair Value hierarchy |  | Valuation Techniques
a) Participating cross currency swap contracts (*) | ​ | Level 3 |  | Pricing models based on discounted cash Present value of the estimated future cash flows based on unobservable yield curves and end period FX rates
b) FX swap, currency, interest swap and option contracts | ​ | Level 2 |  | Present value of the estimated future cash flows based on observable yield curves and end period FX rates
c) Currency forward contracts | ​ | Level 2 |  | Forward exchange rates at the balance sheet date
| (*) | Since the bid-ask spread is unobservable input; in the valuation of participating cross currency swap contracts, prices in the bid- ask price range that were considered the most appropriate were used instead of mid prices. If mid prices were used in the valuation the fair value of participating cross currency swap contracts would have been TL 253,788 lower as at 31 December 2021 (31 December 2020: TL 168,882).
Interest rate risk and currency risk [member] |
Statement [LineItems] |
Summary of Cash Flow Sensitivity Analysis for Variable Rate Instruments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Profit or Loss | ​ | Equity, net of tax
​ | ​ | 100 bp | ​ | 100 bp | ​ | 100 bp | ​ | 100 bp
​ |  | increase |  | decrease |  | increase |  | decrease
31 December 2021 |  |  |  |  |  |  |  |
Participating cross currency swap contracts |  | 1,199,942 |  | 2,230,500 |  | (620,462) |  | (1,445,257)
Cross currency swap contracts |  | 159,719 |  | (33,859) |  | (220,694) |  | (186,611)
Cash Flow sensitivity (net) |  | 1,359,661 |  | 2,196,641 |  | (841,156) |  | (1,631,868)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Profit or Loss | ​ | Equity, net of tax
​ | ​ | 100 bp | ​ | 100 bp | ​ | 100 bp | ​ | 100 bp
​ |  | increase |  | decrease |  | increase |  | decrease
31 December 2020 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Participating cross currency swap contracts |  | 1,158,627 |  | 849,915 |  | (516,772) |  | (247,934)
Cross currency swap contracts |  | 49,843 |  | 45,528 |  | 11,132 |  | 12,642
Cash Flow sensitivity (net) |  | 1,208,470 |  | 895,443 |  | (505,640) |  | (235,292)
Participating cross currency swap contracts [member] |
Statement [LineItems] |
Summary of Fair Value of Derivative Financial Instruments | Movements in the participating cross currency swap contracts for the years ended 31 December 2021 and 31 December 2020 are stated below: ​
​ | ​ | ​ | ​ | ​
​ | ​ | 31 December | ​ | 31 December
​ |  | 2021 |  | 2020
Opening balance |  | 797,060 |  | 495,436
Cash flow effect |  | 45,951 |  | (695,892)
Total gain/loss: |  | ​ |  | ​
Gains recognized in profit or loss |  | 206,118 |  | 997,516
Closing balance |  | 1,049,129 |  | 797,060

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