Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2025-03-31 |
As at 2024-04-04 |
As at 2023-04-04 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
1,481,000,000
GBP
|
848,000,000
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in subsidiaries reported in separate financial statements |
-
GBP
|
-
GBP
|
— |
| Prepayments and accrued income including contract assets [abstract] | |||
| Prepayments and accrued income including contract assets |
394,000,000
GBP
|
294,000,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
28,525,000,000
GBP
|
24,345,000,000
GBP
|
26,096,000,000
GBP
|
| Miscellaneous assets [abstract] | |||
| Net defined benefit asset |
892,000,000
GBP
|
610,000,000
GBP
|
— |
| Derivative financial assets |
4,742,000,000
GBP
|
6,290,000,000
GBP
|
— |
| Investments other than investments accounted for using equity method |
28,663,000,000
GBP
|
26,532,000,000
GBP
|
— |
| Loans and advances | — | — | — |
| Loans and advances to banks |
1,810,000,000
GBP
|
918,000,000
GBP
|
— |
| Loans and advances to customers |
300,889,000,000
GBP
|
213,440,000,000
GBP
|
— |
| Cash and bank balances at central banks |
29,483,000,000
GBP
|
25,231,000,000
GBP
|
— |
| Other assets |
224,000,000
GBP
|
435,000,000
GBP
|
— |
| Trade and other payables [abstract] | |||
| Accruals and deferred income including contract liabilities [abstract] | |||
| Accruals and deferred income including contract liabilities |
1,223,000,000
GBP
|
405,000,000
GBP
|
— |
| Miscellaneous liabilities [abstract] | |||
| Derivative financial liabilities |
1,547,000,000
GBP
|
1,451,000,000
GBP
|
— |
| Deposit liabilities | — | — | — |
| Deposits from banks |
6,053,000,000
GBP
|
16,388,000,000
GBP
|
— |
| Deposits from customers [abstract] | |||
| Deposits from customers |
74,667,000,000
GBP
|
4,530,000,000
GBP
|
— |
| Subordinated liabilities [abstract] | |||
| Subordinated liabilities |
2,444,000,000
GBP
|
2,075,000,000
GBP
|
— |
| Debt instruments issued |
51,109,000,000
GBP
|
34,749,000,000
GBP
|
— |
| Other liabilities |
2,432,000,000
GBP
|
859,000,000
GBP
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Revaluation surplus |
35,000,000
GBP
|
36,000,000
GBP
|
— |
| Reserve of cash flow hedges |
132,000,000
GBP
|
127,000,000
GBP
|
— |
| Reserve of change in value of foreign currency basis spreads |
53,000,000
GBP
|
51,000,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Additional paid-in capital |
1,485,000,000
GBP
|
1,336,000,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
367,877,000,000
GBP
|
272,087,000,000
GBP
|
— |
| Liabilities |
347,395,000,000
GBP
|
254,401,000,000
GBP
|
— |
| Assets less current liabilities [abstract] |