Statement Of Cash Flows [Abstract]
| Concept |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Interest paid, classified as operating activities | — |
1 24
GBP
|
— |
1 26
GBP
|
— |
| Interest received, classified as operating activities | — |
553,000,000
GBP
|
— |
409,000,000
GBP
|
— |
| Cash flows from (used in) operating activities | — |
1 ,18 5
GBP
|
— |
2, 854
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||
| Other cash receipts from sales of equity or debt instruments of other entities, classified as investing activities | — |
857,000,000
GBP
|
— |
1 , 269
GBP
|
— |
| Other cash payments to acquire equity or debt instruments of other entities, classified as investing activities | — |
1, 20 6
GBP
|
— |
3 , 43 8
GBP
|
— |
| Purchase of property, plant and equipment, classified as investing activities | — |
29,000,000
GBP
|
— |
4 2
GBP
|
— |
| Purchase of intangible assets, classified as investing activities | — |
24,000,000
GBP
|
— |
3 9
GBP
|
— |
| Cash flows from (used in) investing activities | — |
4 0 2
GBP
|
— |
2 , 2 5 0
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||
| Payments of lease liabilities, classified as financing activities | — |
2 5
GBP
|
— |
2 9
GBP
|
— |
| Cash flows from (used in) financing activities | — |
25,000,000
GBP
|
— |
2 9
GBP
|
— |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
1 ,6 12
GBP
|
— |
575,000,000
GBP
|
— |
| Cash and cash equivalents |
1 ,956
GBP
|
— |
3,56 8
GBP
|
— |
2, 993
GBP
|