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 |
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 |
–
GBP
|
2,089,300,000
GBP
|
— | — |
2,089,300,000
GBP
|
— | — | — | — | — |
1,889,600,000
GBP
|
1,889,600,000
GBP
|
— | — |
–
GBP
|
— |
| Material income and expense [abstract] | ||||||||||||||||
| Gains (losses) on disposals of investments [abstract] | ||||||||||||||||
| Gains (losses) on disposals of investments |
356,000,000
GBP
|
–
GBP
|
— | — |
356,000,000
GBP
|
— | — | — | — | — |
–
GBP
|
–
GBP
|
— | — |
–
GBP
|
— |
| Operating expense excluding cost of sales |
70,400,000
GBP
|
470,500,000
GBP
|
— | — |
540,900,000
GBP
|
— | — | — | — | — |
470,300,000
GBP
|
500,700,000
GBP
|
— | — |
30,400,000
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 | — | — | — | — |
104,200,000
GBP
|
— | — | — | — | — | — |
61,100,000
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 | — | — | — | — |
22,400,000
GBP
|
— | — | — | — | — | — |
8,300,000
GBP
|
— | — | — | — |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — | — | — | — |
400,000
GBP
|
— | — | — | — | — | — |
400,000
GBP
|
— | — | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||
| Comprehensive income | — | — |
–
GBP
|
90,900,000
GBP
|
811,100,000
GBP
|
–
GBP
|
715,800,000
GBP
|
4,400,000
GBP
|
2,100,000
GBP
|
–
GBP
|
— |
292,100,000
GBP
|
63,100,000
GBP
|
–
GBP
|
— |
353,100,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — |
806,700,000
GBP
|
— | — | — | — | — | — |
290,000,000
GBP
|
— | — | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — | — | — |
4,400,000
GBP
|
— | — | — | — | — | — |
2,100,000
GBP
|
— | — | — | — |