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 |
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 | — |
12,039,500,000
GBP
|
— | — | — | — |
10,285,100,000
GBP
|
— |
| Material income and expense [abstract] | ||||||||
| Gains (losses) on disposals of investments [abstract] | ||||||||
| Gains (losses) on disposals of investments | — |
900,000
GBP
|
— | — | — | — |
–
GBP
|
— |
| Finance income (cost) | — |
67,900,000
GBP
|
— | — | — | — |
54,600,000
GBP
|
— |
| Miscellaneous other comprehensive income [abstract] | ||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations | — |
232,900,000
GBP
|
— |
232,900,000
GBP
|
— |
89,800,000
GBP
|
89,800,000
GBP
|
— |
| Other comprehensive income, before tax, hedges of net investments in foreign operations | — |
38,200,000
GBP
|
— |
38,200,000
GBP
|
— |
11,500,000
GBP
|
11,500,000
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 | — |
4,000,000
GBP
|
— | — | — | — |
19,300,000
GBP
|
— |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — |
300,000
GBP
|
— | — | — | — |
–
GBP
|
— |
| Income tax relating to components of other comprehensive income |
2,600,000
GBP
|
3,700,000
GBP
|
1,400,000
GBP
|
300,000
GBP
|
800,000
GBP
|
–
GBP
|
19 .3
GBP
|
18,500,000
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||
| Comprehensive income |
7,700,000
GBP
|
682,600,000
GBP
|
479,900,000
GBP
|
195,000,000
GBP
|
3,600,000
GBP
|
78,300,000
GBP
|
423,700,000
GBP
|
498,400,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||
| Comprehensive income, attributable to owners of parent | — |
682,600,000
GBP
|
— | — | — | — |
423,700,000
GBP
|
— |