Analysis Of Income And Expense [Abstract]
| Concept |
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 |
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 |
|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||
| Revenue [abstract] | ||||||||
| Revenue |
11,797,100,000
GBP
|
— | — | — | — |
12,039,500,000
GBP
|
— | — |
| Material income and expense [abstract] | ||||||||
| Gains (losses) on disposals of investments [abstract] | ||||||||
| Gains (losses) on disposals of investments |
–
GBP
|
— | — | — | — |
900,000
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 |
126,900,000
GBP
|
— | — |
126,900,000
GBP
|
— |
232,900,000
GBP
|
— |
232,900,000
GBP
|
| Other comprehensive income, before tax, hedges of net investments in foreign operations |
31,400,000
GBP
|
— | — |
31,400,000
GBP
|
— |
38,200,000
GBP
|
— |
38,200,000
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 |
500,000
GBP
|
— | — | — | — |
4,000,000
GBP
|
— | — |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss |
500,000
GBP
|
— | — | — | — |
300,000
GBP
|
— | — |
| Income tax relating to components of other comprehensive income |
–
GBP
|
600,000
GBP
|
100,000
GBP
|
500,000
GBP
|
2,600,000
GBP
|
3,700,000
GBP
|
1,400,000
GBP
|
300,000
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||
| Comprehensive income |
431,300,000
GBP
|
1,700,000
GBP
|
529,000,000
GBP
|
96,000,000
GBP
|
7,700,000
GBP
|
682,600,000
GBP
|
479,900,000
GBP
|
195,000,000
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||
| Comprehensive income, attributable to owners of parent |
431,300,000
GBP
|
— | — | — | — |
682,600,000
GBP
|
— | — |