Statement Of Changes In Equity [Abstract]
| Concept |
As at 2022-04-04 |
As at 2022-04-04 |
As at 2022-04-04 |
As at 2022-04-04 |
As at 2022-04-04 |
As at 2022-04-04 |
As at 2022-04-04 |
As at 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2021-04-05 to 2022-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
2020-04-05 to 2021-04-04 |
As at 2021-04-04 |
As at 2021-04-04 |
As at 2021-04-04 |
As at 2021-04-04 |
As at 2021-04-04 |
As at 2021-04-04 |
As at 2021-04-04 |
As at 2021-04-04 |
As at 2020-04-04 |
As at 2020-04-04 |
As at 2020-04-04 |
As at 2020-04-04 |
As at 2020-04-04 |
As at 2020-04-04 |
As at 2020-04-04 |
As at 2020-04-04 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||
| Equity |
46,000,000
GBP
|
184,000,000
GBP
|
1,334,000,000
GBP
|
1,336,000,000
GBP
|
12,753,000,000
GBP
|
43,000,000
GBP
|
89,000,000
GBP
|
15,699,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
44,000,000
GBP
|
195,000,000
GBP
|
1,334,000,000
GBP
|
1,336,000,000
GBP
|
11,140,000,000
GBP
|
46,000,000
GBP
|
110,000,000
GBP
|
14,113,000,000
GBP
|
48,000,000
GBP
|
593,000,000
GBP
|
306,000,000
GBP
|
10,749,000,000
GBP
|
1,325,000,000
GBP
|
42,000,000
GBP
|
17,000,000
GBP
|
12,962,000,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — | — |
1,252,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
1,252,000,000
GBP
|
-
GBP
|
-
GBP
|
618,000,000
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
-
GBP
|
618,000,000
GBP
|
-
GBP
|
-
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — |
520,000,000
GBP
|
— | — | — | — | — | — | — |
54,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — | — | — | — | — | — | — |
1,795,000,000
GBP
|
5,000,000
GBP
|
11,000,000
GBP
|
-
GBP
|
-
GBP
|
1,772,000,000
GBP
|
3,000,000
GBP
|
20,000,000
GBP
|
546,000,000
GBP
|
2,000,000
GBP
|
111,000,000
GBP
|
-
GBP
|
-
GBP
|
564,000,000
GBP
|
4,000,000
GBP
|
131,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |