Statement Of Comprehensive Income [Abstract]
| Concept |
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 |
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 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
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 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of 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 [abstract] | ||||||||||||||||||||||||||
| Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract] | ||||||||||||||||||||||||||
| Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans | — | — | — | — | — | — | — | — | — | — | — | — |
59. 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1 24 . 7
GBP
|
— |
| Other comprehensive income that will not be reclassified to profit or loss, net of tax | — | — | — | — | — | — | — | — | — | — | — | — |
59. 8
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1 23.0
GBP
|
— |
| Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract] | ||||||||||||||||||||||||||
| Exchange differences on translation [abstract] | ||||||||||||||||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations | — | — | — | — | — | — | — | — | — | — | — | — |
72. 5
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
3. 2
GBP
|
— |
| Cash flow hedges [abstract] | ||||||||||||||||||||||||||
| Other comprehensive income, net of tax, cash flow hedges | — | — | — | — | — | — | — | — | — | — | — | — |
22. 5
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
29,700,000
GBP
|
— |
| Hedges of net investment in foreign operations [abstract] | ||||||||||||||||||||||||||
| Other comprehensive income, net of tax, hedges of net investments in foreign operations | — | — | — | — | — | — | — | — | — | — | — | — |
43 . 1
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
9,400,000
GBP
|
— |
| Other comprehensive income that will be reclassified to profit or loss, net of tax | — | — | — | — | — | — | — | — | — | — | — | — |
394,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
2 1 7. 3
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
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — | — | — | — | — | — | — | — |
28,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— |