Analysis Of Income And Expense [Abstract]
| Concept |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
2022-04-01 to 2023-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||
| Interest income | — | — |
9,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
4,000,000
GBP
|
| Interest income on financial assets designated at fair value through profit or loss | — | — |
29,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
29,000,000
GBP
|
| Dividend income | — | — |
363,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
229,000,000
GBP
|
| Revenue | — | — |
3,877,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
4,666,000,000
GBP
|
| Material income and expense [abstract] | ||||||||||||||||||
| Gains (losses) on disposals of investments [abstract] | ||||||||||||||||||
| Gains (losses) on disposals of investments | — | — |
1,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
64,000,000
GBP
|
| Interest expense | — | — |
61,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
54,000,000
GBP
|
| Other operating income (expense) | — | — |
3,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,000,000
GBP
|
| Operating expense | — | — |
146,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
137,000,000
GBP
|
| Gains (losses) on change in fair value of derivatives [abstract] | ||||||||||||||||||
| Gains (losses) on change in fair value of derivatives | — | — |
116,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
122,000,000
GBP
|
| Fee and commission income (expense) [abstract] | ||||||||||||||||||
| Fee and commission income [abstract] | ||||||||||||||||||
| Portfolio and other management fee income | — | — |
3,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
10,000,000
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 |
4,000,000
GBP
|
–
GBP
|
4,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
4,000,000
GBP
|
–
GBP
|
–
GBP
|
4,000,000
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income |
4,000,000
GBP
|
3,316,000,000
GBP
|
3,839,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
527,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
509,000,000
GBP
|
–
GBP
|
4,000,000
GBP
|
–
GBP
|
4,072,000,000
GBP
|
4,585,000,000
GBP
|