Statement Of Changes In Equity [Abstract]
| Concept |
As at 2023-09-16 |
As at 2023-09-16 |
2022-09-18 to 2023-09-16 |
As at 2023-09-16 |
2022-09-18 to 2023-09-16 |
2022-09-18 to 2023-09-16 |
2022-09-18 to 2023-09-16 |
2022-09-18 to 2023-09-16 |
2022-09-18 to 2023-09-16 |
2022-09-18 to 2023-09-16 |
2022-09-18 to 2023-09-16 |
As at 2023-09-16 |
As at 2023-09-16 |
As at 2023-09-16 |
As at 2023-09-16 |
As at 2023-09-16 |
As at 2022-09-17 |
As at 2022-09-17 |
As at 2022-09-17 |
As at 2022-09-17 |
As at 2022-09-17 |
As at 2022-09-17 |
As at 2022-09-17 |
As at 2022-09-17 |
2021-09-19 to 2022-09-17 |
2021-09-19 to 2022-09-17 |
2021-09-19 to 2022-09-17 |
2021-09-19 to 2022-09-17 |
2021-09-19 to 2022-09-17 |
2021-09-19 to 2022-09-17 |
2021-09-19 to 2022-09-17 |
2021-09-19 to 2022-09-17 |
As at 2021-09-18 |
As at 2021-09-18 |
As at 2021-09-18 |
As at 2021-09-18 |
As at 2021-09-18 |
As at 2021-09-18 |
As at 2021-09-18 |
As at 2021-09-18 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||
| Equity |
2,000,000
GBP
|
42,000,000
GBP
|
— |
11,193,000,000
GBP
|
— | — | — | — | — | — | — |
11,093,000,000
GBP
|
10,910,000,000
GBP
|
100,000,000
GBP
|
179,000,000
GBP
|
44,000,000
GBP
|
11,554,000,000
GBP
|
178,000,000
GBP
|
45,000,000
GBP
|
154,000,000
GBP
|
422,000,000
GBP
|
10,649,000,000
GBP
|
106,000,000
GBP
|
11,448,000,000
GBP
|
— | — | — | — | — | — | — | — |
10,004,000,000
GBP
|
175,000,000
GBP
|
45,000,000
GBP
|
43,000,000
GBP
|
34,000,000
GBP
|
9,692,000,000
GBP
|
83,000,000
GBP
|
9,921,000,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — |
1,068,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,044,000,000
GBP
|
1,044,000,000
GBP
|
24,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
720,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
700,000,000
GBP
|
700,000,000
GBP
|
20,000,000
GBP
|
— | — | — | — | — | — | — | — |
| Other comprehensive income | — | — |
669,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
220,000,000
GBP
|
464,000,000
GBP
|
647,000,000
GBP
|
37,000,000
GBP
|
22,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
1,530,000,000
GBP
|
3,000,000
GBP
|
–
GBP
|
391,000,000
GBP
|
456,000,000
GBP
|
1,519,000,000
GBP
|
669,000,000
GBP
|
11,000,000
GBP
|
— | — | — | — | — | — | — | — |
| Comprehensive income | — | — |
399,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
220,000,000
GBP
|
464,000,000
GBP
|
397,000,000
GBP
|
1,081,000,000
GBP
|
2,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
2,250,000,000
GBP
|
3,000,000
GBP
|
–
GBP
|
391,000,000
GBP
|
456,000,000
GBP
|
2,219,000,000
GBP
|
1,369,000,000
GBP
|
31,000,000
GBP
|
— | — | — | — | — | — | — | — |