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] | |||||
| Cash flows from (used in) operations | — |
1, 6 9 8
GBP
|
— |
3 ,1 0 3
GBP
|
— |
| Income taxes paid (refund), classified as operating activities | — |
2 2
GBP
|
— |
10,000,000
GBP
|
— |
| Cash flows from (used in) operating activities | — |
1,6 76
GBP
|
— |
3,0 93
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
–
GBP
|
— |
2 18
GBP
|
— |
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
5,000,000
GBP
|
— |
7,000,000
GBP
|
— |
| Purchase of property, plant and equipment, classified as investing activities | — |
3,000,000
GBP
|
— |
13,000,000
GBP
|
— |
| Cash flows from (used in) investing activities | — |
1, 5 0 2
GBP
|
— |
2,6 41
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||
| Payments to acquire or redeem entity's shares | — |
328,000,000
GBP
|
— |
–
GBP
|
— |
| Payments of lease liabilities, classified as financing activities | — |
11,000,000
GBP
|
— |
10,000,000
GBP
|
— |
| Interest paid, classified as financing activities | — |
3,000,000
GBP
|
— |
2,000,000
GBP
|
— |
| Cash flows from (used in) financing activities | — |
4 61
GBP
|
— |
307,000,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
287,000,000
GBP
|
— |
14 5
GBP
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents | — |
5,000,000
GBP
|
— |
2,000,000
GBP
|
— |
| Cash and cash equivalents |
1, 7 8 2
GBP
|
— |
2,06 4
GBP
|
— |
1, 9 21
GBP
|