Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
74 8
GBP
|
76 5
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
216,000,000
GBP
|
24 3
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in subsidiaries reported in separate financial statements |
–
GBP
|
–
GBP
|
— |
| Trade and other receivables [abstract] | |||
| Prepayments and accrued income other than contract assets [abstract] | |||
| Prepayments and accrued income other than contract assets |
85,000,000
GBP
|
68,000,000
GBP
|
— |
| Categories of financial assets [abstract] | |||
| Financial assets at fair value through profit or loss [abstract] | |||
| Financial assets at fair value through profit or loss |
1,000,000
GBP
|
3,000,000
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
1 ,956
GBP
|
3,56 8
GBP
|
2, 993
GBP
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | |||
| Non-current assets or disposal groups classified as held for sale |
1,000,000
GBP
|
–
GBP
|
— |
| Miscellaneous assets [abstract] | |||
| Derivative financial assets |
23,000,000
GBP
|
1,000,000
GBP
|
— |
| Loans and advances | — | — | — |
| Loans and advances to customers |
13 ,102
GBP
|
12, 290
GBP
|
— |
| Cash and bank balances at central banks |
1,956,000,000
GBP
|
3,568,000,000
GBP
|
— |
| Other assets |
73,000,000
GBP
|
76,000,000
GBP
|
— |
| Trade and other payables [abstract] | |||
| Accruals and deferred income including contract liabilities [abstract] | |||
| Deferred income including contract liabilities [abstract] | |||
| Deferred income including contract liabilities |
17,000,000
GBP
|
19,000,000
GBP
|
— |
| Miscellaneous liabilities [abstract] | |||
| Derivative financial liabilities |
26,000,000
GBP
|
11,000,000
GBP
|
— |
| Deposit liabilities | — | — | — |
| Deposits from banks |
3,800,000,000
GBP
|
3,800,000,000
GBP
|
— |
| Deposits from customers [abstract] | |||
| Deposits from customers |
1 6,014
GBP
|
16,44 8
GBP
|
— |
| Debt instruments issued |
57 1
GBP
|
58 8
GBP
|
— |
| Repurchase agreements and cash collateral on securities lent |
238,000,000
GBP
|
169,000,000
GBP
|
— |
| Other liabilities |
230,000,000
GBP
|
222,000,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
–
GBP
|
–
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
1 ,015
GBP
|
9 42
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
22 ,11 9
GBP
|
22, 58 8
GBP
|
— |
| Liabilities |
21 ,1 63
GBP
|
21, 553
GBP
|
— |
| Assets less current liabilities [abstract] |