Statement Of Cash Flows [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2022-01-01 to 2022-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|---|
| Statement of cash flows [abstract] | |||
| Cash flows from (used in) operating activities [abstract] | |||
| Adjustments for finance income (cost) |
368,000,000
GBP
|
207,000,000
GBP
|
2,000,000
GBP
|
| Adjustments for amortisation expense |
108,000,000
GBP
|
107,000,000
GBP
|
94,000,000
GBP
|
| Adjustments for depreciation expense |
201,000,000
GBP
|
180,000,000
GBP
|
174,000,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | |||
| Cash advances and loans made to related parties |
—
GBP
|
9,211,000,000
GBP
|
—
GBP
|
| Cash flows from (used in) financing activities [abstract] | |||
| Dividends paid to equity holders of parent, classified as financing activities |
388,000,000
GBP
|
2,682,000,000
GBP
|
1,148,000,000
GBP
|
| Dividends paid to non-controlling interests, classified as financing activities |
58,000,000
GBP
|
48,000,000
GBP
|
35,000,000
GBP
|