Analysis Of Income And Expense [Abstract]
| Concept |
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 |
2022-01-01 to 2022-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||||
| Revenue | — | — |
2,262,400,000
GBP
|
— | — |
2,262,400,000
GBP
|
–
GBP
|
— | — | — | — | — | — | — | — |
–
GBP
|
1,583,300,000
GBP
|
— |
1,583,300,000
GBP
|
— |
| Material income and expense [abstract] | ||||||||||||||||||||
| Gains (losses) on disposals of investments [abstract] | ||||||||||||||||||||
| Gains (losses) on disposals of investments | — | — |
11,600,000
GBP
|
— | — |
–
GBP
|
11,600,000
GBP
|
— | — | — | — | — | — | — | — |
111,800,000
GBP
|
–
GBP
|
— |
111,800,000
GBP
|
— |
| Miscellaneous other comprehensive income [abstract] | ||||||||||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations |
–
GBP
|
28,000,000
GBP
|
145,400,000
GBP
|
–
GBP
|
–
GBP
|
— | — |
145,400,000
GBP
|
–
GBP
|
173,400,000
GBP
|
–
GBP
|
52,100,000
GBP
|
9,700,000
GBP
|
–
GBP
|
42,400,000
GBP
|
— | — |
–
GBP
|
9,700,000
GBP
|
–
GBP
|
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||||||||||||
| Share of profit (loss) of associates and joint ventures accounted for using equity method | — | — |
2,000,000
GBP
|
— | — |
2,100,000
GBP
|
100,000
GBP
|
— | — | — | — | — | — | — | — |
–
GBP
|
3,000,000
GBP
|
— |
3,000,000
GBP
|
— |
| Income tax relating to components of other comprehensive income [abstract] | ||||||||||||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss | — | — |
1,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
10,300,000
GBP
|
— |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — | — |
8,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,900,000
GBP
|
— |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income |
–
GBP
|
28,000,000
GBP
|
2,025,100,000
GBP
|
1,659,900,000
GBP
|
9,700,000
GBP
|
— | — |
2,015,400,000
GBP
|
–
GBP
|
383,500,000
GBP
|
13,000,000
GBP
|
52,100,000
GBP
|
191,300,000
GBP
|
–
GBP
|
2,400,000
GBP
|
— | — |
–
GBP
|
204,300,000
GBP
|
136,800,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income from continuing operations, attributable to owners of parent | — | — |
497,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
147,400,000
GBP
|
— |
| Comprehensive income from discontinued operations, attributable to owners of parent | — | — |
1,518,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
43,900,000
GBP
|
— |
| Comprehensive income, attributable to owners of parent | — | — |
2,015,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
191,300,000
GBP
|
— |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — |
9,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
13,000,000
GBP
|
— |