Disclosure Of Fair Value Measurement [Text Block]
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As at 2022-03-31 |
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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 | — | — | — | — | — | — | — |
7,974,000,000
GBP
|
— | — | — |
8,290,000,000
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 | — | — | — | — | — | — | — |
2,662,000,000
GBP
|
— | — | — |
2,765,000,000
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 |
213,000,000
GBP
|
5,299,000,000
GBP
|
13,000,000
GBP
|
3,528,000,000
GBP
|
13,000,000
GBP
|
1,310,000,000
GBP
|
235,000,000
GBP
|
5,312,000,000
GBP
|
–
GBP
|
5,512,000,000
GBP
|
13,000,000
GBP
|
5,525,000,000
GBP
|
1,308,000,000
GBP
|
234,000,000
GBP
|
2,000,000
GBP
|
13,000,000
GBP
|
3,742,000,000
GBP
|
213,000,000
GBP
|
6,753,000,000
GBP
|
213,000,000
GBP
|
2,000,000
GBP
|
234,000,000
GBP
|
1,307,000,000
GBP
|
4,994,000,000
GBP
|
6,768,000,000
GBP
|
15,000,000
GBP
|
3,000,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |