Statement Of Comprehensive Income [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 |
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 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||||||
| Profit (loss) |
337,200,000
GBP
|
–
GBP
|
338,000,000
GBP
|
800,000
GBP
|
338,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
285,300,000
GBP
|
286,500,000
GBP
|
1,200,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
286,500,000
GBP
|
–
GBP
|
–
GBP
|
| Other comprehensive income [abstract] | ||||||||||||||||||||
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||||
| Cash flow hedges [abstract] | ||||||||||||||||||||
| Other comprehensive income, before tax, cash flow hedges |
18,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
25,100,000
GBP
|
— | — | — | — | — | — | — | — |
| Financial assets measured at fair value through other comprehensive income [abstract] | ||||||||||||||||||||
| Other comprehensive income, before tax, financial assets measured at fair value through other comprehensive income |
98,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
255,600,000
GBP
|
— | — | — | — | — | — | — | — |
| Insurance finance income (expenses) from insurance contracts issued excluded from profit or loss [abstract] | ||||||||||||||||||||
| Other comprehensive income, before tax, insurance finance income (expenses) from insurance contracts issued excluded from profit or loss that will be reclassified to profit or loss |
78,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
177,800,000
GBP
|
— | — | — | — | — | — | — | — |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract] | ||||||||||||||||||||
| Income tax relating to cash flow hedges included in other comprehensive income |
4,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
7,000,000
GBP
|
— | — | — | — | — | — | — | — |
| Income tax relating to financial assets measured at fair value through other comprehensive income included in other comprehensive income |
5,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
13,000,000
GBP
|
— | — | — | — | — | — | — | — |
| Income tax relating to insurance finance income (expenses) from insurance contracts issued included in other comprehensive income that will be reclassified to profit or loss |
9,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
22,800,000
GBP
|
— | — | — | — | — | — | — | — |
| Other comprehensive income |
13,300,000
GBP
|
69,200,000
GBP
|
13,300,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
3,700,000
GBP
|
–
GBP
|
92,400,000
GBP
|
13,600,000
GBP
|
–
GBP
|
73,800,000
GBP
|
–
GBP
|
100,000
GBP
|
18,100,000
GBP
|
155,000,000
GBP
|
242,600,000
GBP
|
73,900,000
GBP
|
–
GBP
|
4,400,000
GBP
|
| Comprehensive income |
350,500,000
GBP
|
69,200,000
GBP
|
351,300,000
GBP
|
800,000
GBP
|
338,000,000
GBP
|
–
GBP
|
3,700,000
GBP
|
–
GBP
|
92,400,000
GBP
|
13,600,000
GBP
|
–
GBP
|
211,500,000
GBP
|
286,500,000
GBP
|
1,100,000
GBP
|
18,100,000
GBP
|
155,000,000
GBP
|
242,600,000
GBP
|
212,600,000
GBP
|
–
GBP
|
4,400,000
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||||
| Comprehensive income, attributable to owners of parent |
351,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
212,600,000
GBP
|
— | — | — | — | — | — | — | — |
| Comprehensive income, attributable to non-controlling interests |
800,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,100,000
GBP
|
— | — | — | — | — | — | — | — |