Statement Of Changes In Equity [Abstract]
| Concept |
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 |
2020-09-13 to 2021-09-18 |
2020-09-13 to 2021-09-18 |
2020-09-13 to 2021-09-18 |
2020-09-13 to 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 |
2020-09-13 to 2021-09-18 |
2020-09-13 to 2021-09-18 |
2020-09-13 to 2021-09-18 |
2020-09-13 to 2021-09-18 |
As at 2021-09-18 |
As at 2021-09-18 |
As at 2021-09-18 |
As at 2020-09-12 |
As at 2020-09-12 |
As at 2020-09-12 |
As at 2020-09-12 |
As at 2020-09-12 |
As at 2020-09-12 |
As at 2020-09-12 |
As at 2020-09-12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||
| Equity |
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
|
45,000,000
GBP
|
175,000,000
GBP
|
34,000,000
GBP
|
43,000,000
GBP
|
— | — | — | — |
9,692,000,000
GBP
|
83,000,000
GBP
|
9,921,000,000
GBP
|
45,000,000
GBP
|
9,439,000,000
GBP
|
175,000,000
GBP
|
323,000,000
GBP
|
7,000,000
GBP
|
9,355,000,000
GBP
|
84,000,000
GBP
|
8,819,000,000
GBP
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — | — |
720,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
700,000,000
GBP
|
700,000,000
GBP
|
20,000,000
GBP
|
478,000,000
GBP
|
478,000,000
GBP
|
20,000,000
GBP
|
498,000,000
GBP
|
— | — | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — |
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
|
101,000,000
GBP
|
433,000,000
GBP
|
–
GBP
|
101,000,000
GBP
|
— | — | — | — | — |
–
GBP
|
357,000,000
GBP
|
–
GBP
|
25,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — | — | — | — | — | — | — |
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
|
579,000,000
GBP
|
911,000,000
GBP
|
20,000,000
GBP
|
599,000,000
GBP
|
— | — | — | — | — |
–
GBP
|
357,000,000
GBP
|
–
GBP
|
25,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
6,000,000
GBP
|
6,000,000
GBP
|
17,000,000
GBP
|
23,000,000
GBP
|
— | — | — | — | — |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — |