Statement Of Financial Position [Abstract]
| Concept |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||
| Property, plant and equipment |
47,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
41,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
208,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
199,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Goodwill |
5,880,300,000
GBP
|
— | — | — | — | — | — | — | — | — |
5,717,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill |
2,972,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,883,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Investments accounted for using equity method |
35,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
29,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current tax assets |
7,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
1,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
2,125,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
884,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
299,400,000
GBP
|
| Assets |
12,145,700,000
GBP
|
— | — | — | — | — | — | — | — | — |
10,197,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||
| Issued capital |
1,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
3,168,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,057,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium |
1,878,600,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,878,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves |
1,928,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
2,028,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
7,152,100,000
GBP
|
— | — | — | — | — | — | — | — | — |
5,757,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests |
314,200,000
GBP
|
— | — | — | — | — | — | — | — | — |
288,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
7,466,300,000
GBP
|
1,928,200,000
GBP
|
314,200,000
GBP
|
1,878,600,000
GBP
|
3,168,400,000
GBP
|
1,400,000
GBP
|
175,500,000
GBP
|
7,152,100,000
GBP
|
2,057,700,000
GBP
|
2,028,000,000
GBP
|
6,045,900,000
GBP
|
5,757,800,000
GBP
|
1,878,600,000
GBP
|
288,100,000
GBP
|
208,000,000
GBP
|
1,500,000
GBP
|
1,807,300,000
GBP
|
177,000,000
GBP
|
5,451,000,000
GBP
|
1,500,000
GBP
|
210,400,000
GBP
|
1,973,800,000
GBP
|
1,878,800,000
GBP
|
5,628,000,000
GBP
|
| Liabilities [abstract] | ||||||||||||||||||||||||
| Current tax liabilities |
48,500,000
GBP
|
— | — | — | — | — | — | — | — | — |
73,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities |
532,900,000
GBP
|
— | — | — | — | — | — | — | — | — |
422,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
4,679,400,000
GBP
|
— | — | — | — | — | — | — | — | — |
4,151,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |