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Financial instruments: valuation - Movement in Level 3 portfolios - Liabilities (Details) - Level 3 - GBP (£) £ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Movement in level 3 liabilities |  |
Amounts recorded in the income statement | £ 381 | £ (90)
Amounts recorded in the statement of comprehensive income | 0 | 0
Level 3 transfers in | 81 | 20
Level 3 transfers out | (64) | (168)
Purchases/Originations | 382 | 305
Settlements/Other decreases | (41) | (28)
Sales | (378) | (321)
Foreign exchange and other adjustments | 6 | (3)
Financial liabilities, class [member] |  |
Movement in level 3 liabilities |  |
Amounts recorded in the income statement in respect of balances held at year end - unrealised | 381 | (90)
Other operating income and interest income | Other financial instruments |  |
Movement in level 3 liabilities |  |
Gains Losses Recognised In Profit Or Loss Fair Value measurement Assets and Liabilities | (14) | (29)
Income from trading activities | Trading assets and liabilities |  |
Movement in level 3 liabilities |  |
Gains Losses Recognised In Profit Or Loss Fair Value measurement Assets and Liabilities | £ (224) | £ (3)

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- Definition The gains (losses) including exchange differences recognised in other comprehensive income on the fair value measurement of liabilities. [Refer: At fair value [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2022-03-24 -Paragraph 93 -Subparagraph e -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_e_ii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The gains (losses) recognised in profit or loss for liabilities measured at fair value that are attributable to the change in unrealised gains or losses relating to those liabilities held at the end of the reporting period. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2022-03-24 -Paragraph 93 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_f&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The gains (losses) including exchange differences recognised in profit or loss on the fair value measurement of liabilities. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2022-03-24 -Paragraph 93 -Subparagraph e -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_e_i&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The increase in the fair value measurement of liabilities resulting from purchases of those liabilities. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2022-03-24 -Paragraph 93 -Subparagraph e -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_e_iii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The decrease in the fair value measurement of liabilities resulting from sales. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2022-03-24 -Paragraph 93 -Subparagraph e -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_e_iii&doctype=Standard -URIDate 2022-03-24 + Details
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