Statement Of Cash Flows [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||||||||||
| Profit (loss) |
1,9 4 0
GBP
|
— |
1,8 57
GBP
|
–
GBP
|
83,000,000
GBP
|
1, 85 7
GBP
|
–
GBP
|
–
GBP
|
1, 9 4 0
GBP
|
–
GBP
|
— |
–
GBP
|
–
GBP
|
1, 6 74
GBP
|
1, 5 91
GBP
|
83,000,000
GBP
|
–
GBP
|
1 , 6 74
GBP
|
1, 5 91
GBP
|
–
GBP
|
— |
| Adjustments to reconcile profit (loss) [abstract] | |||||||||||||||||||||
| Adjustments for income tax expense |
386,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
3 15
GBP
|
— | — | — | — | — | — | — |
| Adjustments for decrease (increase) in inventories |
2 23
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
93,000,000
GBP
|
— | — | — | — | — | — | — |
| Adjustments for provisions |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
5 4
GBP
|
— | — | — | — | — | — | — |
| Adjustments for share-based payments |
11 0
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
101,000,000
GBP
|
— | — | — | — | — | — | — |
| Income taxes paid (refund), classified as operating activities |
395,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
3 65
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) operating activities |
3, 760
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2,8 39
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||||||||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities |
8,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
12 4
GBP
|
— | — | — | — | — | — | — |
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities |
14,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
16 2
GBP
|
— | — | — | — | — | — | — |
| Purchase of intangible assets, classified as investing activities |
1 31
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
9 4
GBP
|
— | — | — | — | — | — | — |
| Dividends received, classified as investing activities |
13 4
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
94,000,000
GBP
|
— | — | — | — | — | — | — |
| Interest received, classified as investing activities |
12 6
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
32,000,000
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) investing activities |
5 41
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
42 2
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||||||||
| Payments to acquire or redeem entity's shares |
5 61
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
788,000,000
GBP
|
— | — | — | — | — | — | — |
| Proceeds from borrowings, classified as financing activities |
162,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
–
GBP
|
— | — | — | — | — | — | — |
| Repayments of borrowings, classified as financing activities |
–
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
4 0 0
GBP
|
— | — | — | — | — | — | — |
| Payments of lease liabilities, classified as financing activities |
29 2
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
236,000,000
GBP
|
— | — | — | — | — | — | — |
| Interest paid, classified as financing activities |
356,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
269,000,000
GBP
|
— | — | — | — | — | — | — |
| Cash flows from (used in) financing activities |
2, 188
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
2,333,000,000
GBP
|
— | — | — | — | — | — | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
1,0 31
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
84,000,000
GBP
|
— | — | — | — | — | — | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents |
7 1
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
10 6
GBP
|
— | — | — | — | — | — | — |
| Cash and cash equivalents | — |
4, 067
GBP
|
— | — | — | — | — | — | — | — |
3 ,1 0 7
GBP
|
— | — | — | — | — | — | — | — | — |
2 , 9 17
GBP
|