Disclosure Of Fair Value Measurement [Text Block]
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As at 2022-04-30 |
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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 |
9,254,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
9,457,000,000
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 |
5,305,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
5,370,000,000
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 |
3,949,000,000
GBP
|
138,000,000
GBP
|
89,000,000
GBP
|
1,708,000,000
GBP
|
2,258,000,000
GBP
|
–
GBP
|
57,000,000
GBP
|
3,949,000,000
GBP
|
9,000,000
GBP
|
2,251,000,000
GBP
|
4,087,000,000
GBP
|
4,084,000,000
GBP
|
3,000,000
GBP
|
1,581,000,000
GBP
|
113,000,000
GBP
|
15,000,000
GBP
|
138,000,000
GBP
|
14,000,000
GBP
|
1,352,000,000
GBP
|
105,000,000
GBP
|
2,248,000,000
GBP
|
4,232,000,000
GBP
|
2,000,000
GBP
|
137,000,000
GBP
|
9,000,000
GBP
|
4,234,000,000
GBP
|
609,000,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |