Statement Of Changes In Equity [Abstract]
| Concept |
2022-04-01 to 2023-03-31 |
As at 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 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 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
As at 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 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 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
2021-04-01 to 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 |
2021-04-01 to 2022-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity | — |
10,46 6. 3
GBP
|
— | — | — | — |
11 ,115.4
GBP
|
821 . 2
GBP
|
5 4 7. 0
GBP
|
52 .6
GBP
|
— | — | — | — | — |
4 41 . 2
GBP
|
— | — |
8,583,900,000
GBP
|
6, 68 9. 8
GBP
|
1 ,8 82 .4
GBP
|
6 49. 1
GBP
|
32 . 1
GBP
|
— |
4 9. 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
9,128,800,000
GBP
|
6,600,000
GBP
|
536 .5
GBP
|
— |
40,600,000
GBP
|
835. 1
GBP
|
8, 07 7. 8
GBP
|
6 , 572 .9
GBP
|
1 ,051 .0
GBP
|
9,16 9.4
GBP
|
7 7. 5
GBP
|
— |
49. 2
GBP
|
3,921 . 1
GBP
|
133 .6
GBP
|
6,6 81 .1
GBP
|
8 4 7. 1
GBP
|
–
GBP
|
5 24 . 5
GBP
|
400,000
GBP
|
1 , 47 2 .4
GBP
|
6 ,681 .1
GBP
|
5,208,700,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
–
GBP
|
— |
84 . 2
GBP
|
38,800,000
GBP
|
–
GBP
|
1 23 .0
GBP
|
— | — | — | — |
1 ,790. 8
GBP
|
–
GBP
|
–
GBP
|
1 , 851 .4
GBP
|
23,600,000
GBP
|
— |
–
GBP
|
12 3.0
GBP
|
— | — | — | — | — |
6 0.6
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
3,027 .0
GBP
|
–
GBP
|
1 ,052.4
GBP
|
3,077,700,000
GBP
|
50,700,000
GBP
|
–
GBP
|
3,027,000,000
GBP
|
2,025,300,000
GBP
|
— | — | — |
3,077,700,000
GBP
|
— | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
–
GBP
|
— |
32 9.4
GBP
|
–
GBP
|
363 .7
GBP
|
3 29. 4
GBP
|
— | — | — | — | — |
25 .5
GBP
|
–
GBP
|
— |
5,100,000
GBP
|
— |
–
GBP
|
59. 8
GBP
|
— | — | — | — | — |
334 . 5
GBP
|
— |
–
GBP
|
–
GBP
|
6. 2
GBP
|
123 .0
GBP
|
–
GBP
|
— |
34 0.3
GBP
|
–
GBP
|
211 .1
GBP
|
3 40. 3
GBP
|
— | — | — | — |
34 0. 3
GBP
|
— | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
–
GBP
|
— |
24 5. 2
GBP
|
38,800,000
GBP
|
363,700,000
GBP
|
206 .4
GBP
|
— | — | — | — | — |
25,500,000
GBP
|
–
GBP
|
— |
28,700,000
GBP
|
— |
–
GBP
|
1 82 .8
GBP
|
— | — | — | — | — |
273. 9
GBP
|
— |
–
GBP
|
–
GBP
|
6. 2
GBP
|
3,1 50.0
GBP
|
–
GBP
|
— |
3 ,41 8 . 0
GBP
|
50,700,000
GBP
|
211 .1
GBP
|
3 , 3 6 7. 3
GBP
|
— | — | — | — |
3 ,41 8 . 0
GBP
|
— | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Issue of equity |
–
GBP
|
— |
18 .0
GBP
|
–
GBP
|
–
GBP
|
1 8.0
GBP
|
— | — | — | — | — |
–
GBP
|
–
GBP
|
— |
–
GBP
|
— |
–
GBP
|
18 .0
GBP
|
— | — | — | — | — |
18,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
6,300,000
GBP
|
–
GBP
|
— |
6,300,000
GBP
|
–
GBP
|
–
GBP
|
6. 3
GBP
|
— | — | — | — |
6,300,000
GBP
|
— | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
–
GBP
|
— |
955 .8
GBP
|
–
GBP
|
–
GBP
|
95 5. 8
GBP
|
— | — | — | — | — |
–
GBP
|
–
GBP
|
— |
–
GBP
|
— |
–
GBP
|
955. 8
GBP
|
— | — | — | — | — |
955 .8
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
862,300,000
GBP
|
–
GBP
|
— |
862,300,000
GBP
|
–
GBP
|
–
GBP
|
862,300,000
GBP
|
— | — | — | — |
862,300,000
GBP
|
— | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
4 0.6
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — |
40,600,000
GBP
|
— | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
–
GBP
|
— |
18,700,000
GBP
|
–
GBP
|
–
GBP
|
18,700,000
GBP
|
— | — | — | — | — |
–
GBP
|
–
GBP
|
— |
–
GBP
|
— |
–
GBP
|
18 .7
GBP
|
— | — | — | — | — |
18,700,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
20,800,000
GBP
|
–
GBP
|
— |
20. 8
GBP
|
–
GBP
|
–
GBP
|
20. 8
GBP
|
— | — | — | — |
20. 8
GBP
|
— | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |