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 |
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
|
1,038,000,000
GBP
|
–
GBP
|
1,303,000,000
GBP
|
264,000,000
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
1,038,000,000
GBP
|
–
GBP
|
1,039,000,000
GBP
|
963,000,000
GBP
|
–
GBP
|
2,000,000
GBP
|
963,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
965,000,000
GBP
|
253,000,000
GBP
|
71 2
GBP
|
–
GBP
|
| Other comprehensive income [abstract] | ||||||||||||||||||||||
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||||||
| Exchange differences on translation [abstract] | ||||||||||||||||||||||
| Reclassification adjustments on exchange differences on translation of foreign operations, before tax | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
12,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
12,000,000
GBP
|
12,000,000
GBP
|
— | — |
–
GBP
|
| Cash flow hedges [abstract] | ||||||||||||||||||||||
| Gains (losses) on cash flow hedges, before tax | — | — | — | — | — | — | — | — | — | — |
10,000,000
GBP
|
— | — | — | — | — | — | — |
1,000,000
GBP
|
— | — | — |
| Other comprehensive income |
10,000,000
GBP
|
10,000,000
GBP
|
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
10,000,000
GBP
|
11,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
12,000,000
GBP
|
11,000,000
GBP
|
— | — |
1,000,000
GBP
|
| Comprehensive income |
10,000,000
GBP
|
1,028,000,000
GBP
|
–
GBP
|
— | — |
–
GBP
|
–
GBP
|
1,000,000
GBP
|
1,038,000,000
GBP
|
–
GBP
|
1,029,000,000
GBP
|
952,000,000
GBP
|
–
GBP
|
2,000,000
GBP
|
963,000,000
GBP
|
–
GBP
|
–
GBP
|
12,000,000
GBP
|
954,000,000
GBP
|
— | — |
1,000,000
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — | — | — | — | — |
1,028,000,000
GBP
|
— | — | — | — | — | — | — |
952,000,000
GBP
|
— | — | — |
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — | — | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — |
2,000,000
GBP
|
— | — | — |