Disclosure Of Fair Value Measurement [Text Block]
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| Disclosure of fair value measurement [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [text block] | — | — | — |
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of assets [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Assets | — | — | — | — |
8,031,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
9,212,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, assets [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of liabilities [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Liabilities | — | — | — | — |
2,941,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
3,370,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, liabilities [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of equity [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity |
5,000,000
GBP
|
207,000,000
GBP
|
141,000,000
GBP
|
— |
5,090,000,000
GBP
|
4 ,449
GBP
|
327,000,000
GBP
|
640,000,000
GBP
|
257,000,000
GBP
|
4,878,000,000
GBP
|
7,000,000
GBP
|
149,000,000
GBP
|
207,000,000
GBP
|
5,037,000,000
GBP
|
129,000,000
GBP
|
5,679,000,000
GBP
|
280,000,000
GBP
|
640,000,000
GBP
|
5,893,000,000
GBP
|
5,842,000,000
GBP
|
7,000,000
GBP
|
207,000,000
GBP
|
–
GBP
|
–
GBP
|
149,000,000
GBP
|
149,000,000
GBP
|
–
GBP
|
7,000,000
GBP
|
207,000,000
GBP
|
280,000,000
GBP
|
640,000,000
GBP
|
51,000,000
GBP
|
51,000,000
GBP
|
51,000,000
GBP
|
5,628,000,000
GBP
|
–
GBP
|
129,000,000
GBP
|
–
GBP
|
129,000,000
GBP
|
–
GBP
|
640,000,000
GBP
|
4,986,000,000
GBP
|
4,986,000,000
GBP
|
280,000,000
GBP
|
5,842,000,000
GBP
|
5,628,000,000
GBP
|
5,766,000,000
GBP
|
171,000,000
GBP
|
1,094,000,000
GBP
|
207,000,000
GBP
|
6,000,000
GBP
|
7,847,000,000
GBP
|
305,000,000
GBP
|
7,634,000,000
GBP
|
640,000,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of significant unobservable inputs used in fair value measurement of assets [text block] | — | — | — |
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| Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, assets [text block] | — | — | — |
|
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