Statement Of Changes In Equity [Abstract]
| Concept |
2023-04-02 to 2024-03-30 |
2023-04-02 to 2024-03-30 |
2023-04-02 to 2024-03-30 |
2023-04-02 to 2024-03-30 |
2023-04-02 to 2024-03-30 |
2023-04-02 to 2024-03-30 |
2023-04-02 to 2024-03-30 |
2022-04-03 to 2023-04-01 |
2022-04-03 to 2023-04-01 |
2022-04-03 to 2023-04-01 |
2022-04-03 to 2023-04-01 |
2022-04-03 to 2023-04-01 |
2022-04-03 to 2023-04-01 |
2022-04-03 to 2023-04-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||
| Dividends recognised as distributions to owners of parent |
233,000,000
GBP
|
233,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
233,000,000
GBP
|
–
GBP
|
203,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
2 03
GBP
|
2 03
GBP
|
| Increase (decrease) through exercise of options, equity |
–
GBP
|
1,000,000
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
3,000,000
GBP
|
–
GBP
|
–
GBP
|
3,000,000
GBP
|
3,000,000
GBP
|
–
GBP
|
| Purchase of treasury shares |
4 02
GBP
|
402,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
402,000,000
GBP
|
–
GBP
|
404,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
404,000,000
GBP
|
404,000,000
GBP
|