Disclosure Of Analysis Of Other Comprehensive Income By Item [Text Block]
| Concept |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
2024-04-05 to 2025-03-31 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
2023-04-05 to 2024-04-04 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of analysis of other comprehensive income by item [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of analysis of other comprehensive income by item [abstract] | ||||||||||||||||||||
| Disclosure of analysis of other comprehensive income by item [line items] | ||||||||||||||||||||
| Other comprehensive income, net of tax, cash flow hedges |
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
5,000,000
GBP
|
-
GBP
|
5,000,000
GBP
|
5,000,000
GBP
|
-
GBP
|
-
GBP
|
49,000,000
GBP
|
49,000,000
GBP
|
-
GBP
|
49,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
| Other comprehensive income, net of tax, change in value of foreign currency basis spreads |
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
2,000,000
GBP
|
2,000,000
GBP
|
-
GBP
|
-
GBP
|
2,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
4,000,000
GBP
|
-
GBP
|
4,000,000
GBP
|
-
GBP
|
-
GBP
|
4,000,000
GBP
|
-
GBP
|
-
GBP
|
| Other comprehensive income, net of tax, financial assets measured at fair value through other comprehensive income | — | — | — | — | — |
80,000,000
GBP
|
— | — | — | — | — | — | — | — |
28,000,000
GBP
|
— | — | — | — | — |
| Other comprehensive income, net of tax, gains (losses) from investments in equity instruments | — | — | — | — | — |
2,000,000
GBP
|
— | — | — | — | — | — | — | — |
4,000,000
GBP
|
— | — | — | — | — |
| Other comprehensive income, net of tax, gains (losses) on revaluation of property, plant and equipment, right-of-use assets and intangible assets |
-
GBP
|
-
GBP
|
1,000,000
GBP
|
-
GBP
|
-
GBP
|
1,000,000
GBP
|
-
GBP
|
-
GBP
|
1,000,000
GBP
|
-
GBP
|
2,000,000
GBP
|
-
GBP
|
2,000,000
GBP
|
-
GBP
|
2,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
| Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans |
-
GBP
|
144,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
144,000,000
GBP
|
-
GBP
|
-
GBP
|
144,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
190,000,000
GBP
|
-
GBP
|
190,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
190,000,000
GBP
|