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Financial Instruments - classification - IBOR reform (Details) - GBP (£) £ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | £ 781,992 | £ 799,491
Financial Liabilities | 740,189 | 755,667
IBOR reform |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Loan commitments | 7,437 | 42,702
Other IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Loan commitments | 55 | 682
GBP LIBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Loan commitments | 1,016 | 25,616
EUR IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Loan commitments |  | 7,176
USD IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Loan commitments | 6,366 | 9,228
Subject to conversion provisions under IBOR reform |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 22,056 |
Financial Liabilities | 426 |
Loan commitments | 15,785 |
Derivatives [Member] | IBOR reform |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 1,155,600 | 5,424,600
Derivatives [Member] | Other IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount |  | 289,600
Derivatives [Member] | GBP LIBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 3,600 | 1,407,500
Derivatives [Member] | EUR IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount |  | 2,358,700
Derivatives [Member] | USD IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 1,152,000 | 1,368,800
Derivatives [Member] | Subject to conversion provisions under IBOR reform |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 557,700 |
Currency swaps | Other IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount |  | 2,200
Currency swaps | Other IBOR | GBP |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 500 | 300
Currency swaps | Other IBOR | Other IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 400 | 300
Currency swaps | Other IBOR | USD |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 25,300 | 47,400
Currency swaps | Other IBOR | Euro |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount |  | 1,000
Currency swaps | GBP LIBOR | GBP |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 8,700 | 5,200
Currency swaps | GBP LIBOR | USD |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 91,700 | 98,500
Currency swaps | GBP LIBOR | Euro |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 100 | 2,300
Currency swaps | EUR IBOR | GBP |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount |  | 2,900
Currency swaps | EUR IBOR | Other IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount |  | 700
Currency swaps | EUR IBOR | USD |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount |  | 85,800
Currency swaps | EUR IBOR | Euro |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 100 | 5,100
Currency swaps | USD IBOR | GBP |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 8,200 | 2,000
Currency swaps | USD IBOR | Other IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 400 | 1,200
Currency swaps | USD IBOR | USD |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount | 117,000 | 231,700
Currency swaps | USD IBOR | Euro |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount |  | 1,800
Basis swaps | Other IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount |  | 10,000
Basis swaps | GBP LIBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount |  | 97,000
Basis swaps | EUR IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount |  | 49,000
Basis swaps | USD IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Notional amount |  | 81,000
Trading assets. | IBOR reform |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 152 | 484
Trading assets. | Other IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets |  | 1
Trading assets. | GBP LIBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 62 | 75
Trading assets. | EUR IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets |  | 348
Trading assets. | USD IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 90 | 60
Loans to banks - amortised cost. | IBOR reform |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 11 | 206
Loans to banks - amortised cost. | GBP LIBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets |  | 23
Loans to banks - amortised cost. | EUR IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets |  | 101
Loans to banks - amortised cost. | USD IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 11 | 82
Loans to customers - amortised cost. | IBOR reform |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 9,620 | 51,849
Loans to customers - amortised cost. | Other IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 267 | 234
Loans to customers - amortised cost. | GBP LIBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 4,788 | 40,299
Loans to customers - amortised cost. | EUR IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets |  | 4,950
Loans to customers - amortised cost. | USD IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 4,565 | 6,366
Other financial assets |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 46,145 | 55,148
Other financial assets | IBOR reform |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 1,632 | 3,591
Other financial assets | GBP LIBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 864 | 2,918
Other financial assets | EUR IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets |  | 370
Other financial assets | USD IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Assets | 768 | 303
Bank deposits | IBOR reform |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities | 37 | 474
Bank deposits | Other IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities |  | 107
Bank deposits | USD IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities | 37 | 367
Customer deposits. | IBOR reform |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities |  | 4
Customer deposits. | Other IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities |  | 4
Trading liabilities. | IBOR reform |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities | 197 | 739
Trading liabilities. | Other IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities |  | 2
Trading liabilities. | GBP LIBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities | 31 | 54
Trading liabilities. | EUR IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities |  | 269
Trading liabilities. | USD IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities | 166 | 414
Financial liabilities (other) |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities | 49,326 | 45,811
Financial liabilities (other) | IBOR reform |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities | 9,544 | 18,396
Financial liabilities (other) | Other IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities | 131 | 196
Financial liabilities (other) | GBP LIBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities | 2,390 | 2,492
Financial liabilities (other) | EUR IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities |  | 5,902
Financial liabilities (other) | USD IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities | 7,023 | 9,806
Subordinated Liabilities | IBOR reform |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities | 90 | 1,296
Subordinated Liabilities | GBP LIBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities |  | 8
Subordinated Liabilities | EUR IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities |  | 438
Subordinated Liabilities | USD IBOR |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Financial Liabilities | £ 90 | £ 850

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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_25&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 35H -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_35H&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 35I -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_35I&doctype=Standard -URIDate 2021-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 35M -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_35M&doctype=Standard -URIDate 2021-03-24 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 35N -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_35N&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_25&doctype=Standard -URIDate 2021-03-24 + Details
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