Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
2023-04-01 to 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
2022-04-01 to 2023-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
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| Disclosure of fair value measurement [text block] | — | — | — | — | — | — |
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— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 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 | — | — | — | — | — | — | — |
21,641,000,000
GBP
|
— | — | — |
17,819,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, assets [abstract] | |||||||||||||||||||||||||||||
| Changes in fair value measurement, assets [abstract] | |||||||||||||||||||||||||||||
| Gains (losses) recognised in profit or loss, fair value measurement, assets [abstract] | |||||||||||||||||||||||||||||
| Gains (losses) recognised in profit or loss on exchange differences, fair value measurement, assets | — | — | — | — | — | — |
238,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
203,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| 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 | — | — | — | — | — | — | — |
1,471,000,000
GBP
|
— | — | — |
975,000,000
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 |
42,000,000
GBP
|
1,519,000,000
GBP
|
791,000,000
GBP
|
719,000,000
GBP
|
92,000,000
GBP
|
43,000,000
GBP
|
— |
20,170,000,000
GBP
|
6,000,000
GBP
|
17,154,000,000
GBP
|
31,000,000
GBP
|
16,844,000,000
GBP
|
790,000,000
GBP
|
719,000,000
GBP
|
108,000,000
GBP
|
43,000,000
GBP
|
1,327,000,000
GBP
|
14,044,000,000
GBP
|
2,000,000
GBP
|
— |
43,000,000
GBP
|
100,000,000
GBP
|
10,151,000,000
GBP
|
6,000,000
GBP
|
1,125,000,000
GBP
|
12,754,000,000
GBP
|
719,000,000
GBP
|
789,000,000
GBP
|
33,000,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |