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Derivatives - fair value of the hedging derivative (Details) - GBP (£) £ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Fair value of the hedging derivative |  |  |
Derivative financial assets | £ 106,139 | £ 166,523 |
Derivative financial liabilities | 100,835 | 160,705 |
Derivatives held for hedging before IFRS netting |  |  |
Fair value of the hedging derivative |  |  |
Notional amount | 206,500 | 205,300 |
Changes in fair value used for hedge ineffectiveness |  | (702) |
Derivatives [Member] | Derivatives held for hedging before IFRS netting |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial liabilities | 3,316 | 5,179 |
Derivatives [Member] | IFRS netting/Clearing house settlements |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial liabilities | (3,196) | (5,049) |
Derivatives [Member] | Derivatives after IFRS netting |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial liabilities | 120 | 130 |
Fair value hedging |  |  |
Fair value of the hedging derivative |  |  |
Changes in fair value used for hedge ineffectiveness | (846) | 877 | £ 610
Fair value hedging | Interest rate contracts |  |  |
Fair value of the hedging derivative |  |  |
Notional amount | 65,600 | 65,500 |
Changes in fair value used for hedge ineffectiveness | 897 | (875) |
Fair value hedging | Derivatives [Member] | Interest rate contracts |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial liabilities | 2,057 | 3,844 |
Cash flow hedging | Interest rate contracts |  |  |
Fair value of the hedging derivative |  |  |
Notional amount | 133,100 | 128,800 |
Changes in fair value used for hedge ineffectiveness | (931) | 217 |
Cash flow hedging | Exchange rate contracts |  |  |
Fair value of the hedging derivative |  |  |
Notional amount | 7,300 | 10,800 |
Changes in fair value used for hedge ineffectiveness | 27 | (55) |
Cash flow hedging | Derivatives [Member] | Interest rate contracts |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial liabilities | 1,149 | 1,210 |
Cash flow hedging | Derivatives [Member] | Exchange rate contracts |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial liabilities | 109 | 116 |
Net investment hedging | Exchange rate contracts |  |  |
Fair value of the hedging derivative |  |  |
Notional amount | 500 | 200 |
Changes in fair value used for hedge ineffectiveness | 7 | 11 |
Net investment hedging | Derivatives [Member] | Exchange rate contracts |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial liabilities | 1 | 9 |
Derivatives [Member] | Derivatives held for hedging before IFRS netting |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial assets | 2,169 | 3,950 |
Derivatives [Member] | IFRS netting/Clearing house settlements |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial assets | (2,125) | (3,857) |
Derivatives [Member] | Derivatives after IFRS netting |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial assets | 44 | 93 |
Derivatives [Member] | Fair value hedging | Interest rate contracts |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial assets | 1,176 | 1,878 |
Derivatives [Member] | Cash flow hedging | Interest rate contracts |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial assets | 952 | 2,035 |
Derivatives [Member] | Cash flow hedging | Exchange rate contracts |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial assets | 30 | 37 |
Derivatives [Member] | Net investment hedging | Exchange rate contracts |  |  |
Fair value of the hedging derivative |  |  |
Derivative financial assets | 11 |  |
Exchange rate contracts |  |  |
Fair value of the hedging derivative |  |  |
Notional amount | 3,167,000 | 3,328,000 |
Derivative financial assets | 38,517 | 52,239 |
Derivative financial liabilities | 39,286 | 55,107 |
Interest rate risk |  |  |
Fair value of the hedging derivative |  |  |
Notional amount | 8,919,000 | 10,703,000 |
Derivative financial assets | 67,458 | 114,115 |
Derivative financial liabilities | 61,206 | 105,214 |
Credit derivatives |  |  |
Fair value of the hedging derivative |  |  |
Notional amount | 14,000 | 15,000 |
Derivative financial assets | 154 | 161 |
Derivative financial liabilities | 343 | 376 |
Equity and commodity contracts |  |  |
Fair value of the hedging derivative |  |  |
Notional amount |  | 1,000 |
Derivative financial assets | £ 10 | 8 |
Derivative financial liabilities |  | £ 8 |

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- Definition The gain (loss) on the change in fair value of the hedged item used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 24B -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_24B_a_iv&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 24B -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_24B_b_i&doctype=Standard -URIDate 2021-03-24 + Details
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