Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
131,000,000
GBP
|
142,000,000
GBP
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
457,000,000
GBP
|
556,000,000
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in associates reported in separate financial statements |
2,000,000
GBP
|
1,000,000
GBP
|
— |
| Prepayments and accrued income including contract assets [abstract] | |||
| Accrued income including contract assets [abstract] | |||
| Contract assets |
9,000,000
GBP
|
413,000,000
GBP
|
— |
| Categories of financial assets [abstract] | |||
| Financial assets |
4 7, 5 6 5
GBP
|
6 3 , 2 74
GBP
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
2,06 4
GBP
|
1,9 21
GBP
|
2, 253
GBP
|
| Miscellaneous assets [abstract] | |||
| Derivative financial assets |
14,000,000
GBP
|
43,000,000
GBP
|
— |
| Loans and advances | — | — | — |
| Loans and advances to customers |
29,000,000
GBP
|
2 19
GBP
|
— |
| Trade and other payables [abstract] | |||
| Accruals and deferred income including contract liabilities [abstract] | |||
| Deferred income including contract liabilities [abstract] | |||
| Contract liabilities [abstract] | |||
| Contract liabilities |
–
GBP
|
379,000,000
GBP
|
— |
| Miscellaneous liabilities [abstract] | |||
| Derivative financial liabilities |
15,000,000
GBP
|
20,000,000
GBP
|
— |
| Investment contracts liabilities |
4 1, 0 71
GBP
|
5 7, 4 0 7
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
11 6
GBP
|
12 5
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
1, 4 8 2
GBP
|
1, 49 5
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Reserve of share-based payments |
42,000,000
GBP
|
42,000,000
GBP
|
— |
| Capital redemption reserve |
17,000,000
GBP
|
8,000,000
GBP
|
— |
| Merger reserve |
25,000,000
GBP
|
149,000,000
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
5 0 ,74 0
GBP
|
6 7, 3 7 2
GBP
|
— |
| Liabilities |
49, 0 01
GBP
|
6 5,494
GBP
|
— |
| Assets less current liabilities [abstract] |