Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 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 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Equity | — | — | — | — | — | — | — |
6,718,000,000
GBP
|
213,000,000
GBP
|
2,000,000
GBP
|
234,000,000
GBP
|
1,307,000,000
GBP
|
4,959,000,000
GBP
|
— |
6,733,000,000
GBP
|
15,000,000
GBP
|
— | — |
3,000,000
GBP
|
— |
2,000,000
GBP
|
213,000,000
GBP
|
5,983,000,000
GBP
|
234,000,000
GBP
|
1,307,000,000
GBP
|
4,154,000,000
GBP
|
14,000,000
GBP
|
59,000,000
GBP
|
5,924,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
112,000,000
GBP
|
234,000,000
GBP
|
213,000,000
GBP
|
5,243,000,000
GBP
|
7,147,000,000
GBP
|
26,000,000
GBP
|
7,035,000,000
GBP
|
1,307,000,000
GBP
|
12,000,000
GBP
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
958,000,000
GBP
|
–
GBP
|
2,000,000
GBP
|
958,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — |
960,000,000
GBP
|
— | — |
257,000,000
GBP
|
703,000,000
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|
–
GBP
|
178,000,000
GBP
|
1,261,000,000
GBP
|
1,083,000,000
GBP
|
–
GBP
|
–
GBP
|
1,031,000,000
GBP
|
–
GBP
|
52,000,000
GBP
|
1,031,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Other comprehensive income |
11,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
12,000,000
GBP
|
— | — | — | — | — | — |
11,000,000
GBP
|
— | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|
24,000,000
GBP
|
— | — |
5,000,000
GBP
|
–
GBP
|
–
GBP
|
1 7
GBP
|
2,000,000
GBP
|
–
GBP
|
5,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income |
947,000,000
GBP
|
–
GBP
|
2,000,000
GBP
|
958,000,000
GBP
|
–
GBP
|
–
GBP
|
12,000,000
GBP
|
— | — | — | — | — | — |
949,000,000
GBP
|
— | — | — | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|
24,000,000
GBP
|
— | — |
1,088,000,000
GBP
|
–
GBP
|
–
GBP
|
1,014,000,000
GBP
|
2,000,000
GBP
|
52,000,000
GBP
|
1,036,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
157,000,000
GBP
|
–
GBP
|
–
GBP
|
157,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — |
157,000,000
GBP
|
— | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — | — | — |
–
GBP
|
–
GBP
|
— | — |
78,000,000
GBP
|
–
GBP
|
–
GBP
|
78,000,000
GBP
|
–
GBP
|
–
GBP
|
78,000,000
GBP
|
— | — | — | — | — | — | — | — | — |