Analysis Of Income And Expense [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 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||
| Interest income | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — |
1,000,000
GBP
|
— | — | — |
| Interest income on financial assets designated at fair value through profit or loss | — | — | — | — | — | — | — |
30,000,000
GBP
|
— | — | — | — | — | — |
22,000,000
GBP
|
— | — | — |
| Dividend income | — | — | — | — | — | — | — |
206,000,000
GBP
|
— | — | — | — | — | — |
49,000,000
GBP
|
— | — | — |
| Revenue | — | — | — | — | — | — | — |
4,079,000,000
GBP
|
— | — | — | — | — | — |
1, 9 3 1
GBP
|
— | — | — |
| Material income and expense [abstract] | ||||||||||||||||||
| Gains (losses) on disposals of investments [abstract] | ||||||||||||||||||
| Gains (losses) on disposals of investments | — | — | — | — | — | — | — |
89,000,000
GBP
|
— | — | — | — | — | — |
9,000,000
GBP
|
— | — | — |
| Interest expense | — | — | — | — | — | — | — |
53,000,000
GBP
|
— | — | — | — | — | — |
47,000,000
GBP
|
— | — | — |
| Operating expense | — | — | — | — | — | — | — |
12 7
GBP
|
— | — | — | — | — | — |
111,000,000
GBP
|
— | — | — |
| Gains (losses) on change in fair value of derivatives [abstract] | ||||||||||||||||||
| Gains (losses) on change in fair value of derivatives | — | — | — | — | — | — | — |
2,000,000
GBP
|
— | — | — | — | — | — |
24,000,000
GBP
|
— | — | — |
| Fee and commission income (expense) [abstract] | ||||||||||||||||||
| Fee and commission income [abstract] | ||||||||||||||||||
| Portfolio and other management fee income | — | — | — | — | — | — | — |
6,000,000
GBP
|
— | — | — | — | — | — |
13,000,000
GBP
|
— | — | — |
| Miscellaneous other comprehensive income [abstract] | ||||||||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations |
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
3,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
3,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income |
–
GBP
|
3,5 49
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
466,000,000
GBP
|
–
GBP
|
4 , 0 14
GBP
|
–
GBP
|
3,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
14 8
GBP
|
1,7 2 6
GBP
|
–
GBP
|
1, 5 8 1
GBP
|
–
GBP
|