Statement Of Financial Position [Abstract]
| Concept |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
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 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||
| Property, plant and equipment |
60,800,000
GBP
|
— | — | — | — | — | — | — |
47,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
211,100,000
GBP
|
— | — | — | — | — | — | — |
208,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Goodwill |
6,629,800,000
GBP
|
— | — | — | — | — | — | — |
5,880,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill |
3,140,900,000
GBP
|
— | — | — | — | — | — | — |
2,972,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Investments accounted for using equity method |
58,800,000
GBP
|
— | — | — | — | — | — | — |
35,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
17,600,000
GBP
|
— | — | — | — | — | — | — |
1,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current assets |
10,468,700,000
GBP
|
— | — | — | — | — | — | — |
9,521,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||
| Current inventories |
36,200,000
GBP
|
— | — | — | — | — | — | — |
28,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current receivables |
546,900,000
GBP
|
— | — | — | — | — | — | — |
460,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
389,300,000
GBP
|
— | — | — | — | — | — | — |
2,125,800,000
GBP
|
— | — | — | — | — | — | — | — | — |
884,800,000
GBP
|
— | — | — | — | — |
| Current assets |
1,055,500,000
GBP
|
— | — | — | — | — | — | — |
2,624,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Assets |
11,524,200,000
GBP
|
— | — | — | — | — | — | — |
12,145,700,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||
| Issued capital |
1,400,000
GBP
|
— | — | — | — | — | — | — |
1,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
2,853,500,000
GBP
|
— | — | — | — | — | — | — |
3,168,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Share premium |
1,878,600,000
GBP
|
— | — | — | — | — | — | — |
1,878,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves |
2,090,600,000
GBP
|
— | — | — | — | — | — | — |
1,928,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
6,748,500,000
GBP
|
— | — | — | — | — | — | — |
7,152,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests |
436,100,000
GBP
|
— | — | — | — | — | — | — |
314,200,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
7,184,600,000
GBP
|
2,853,500,000
GBP
|
2,090,600,000
GBP
|
436,100,000
GBP
|
1,878,600,000
GBP
|
1,400,000
GBP
|
75,600,000
GBP
|
6,748,500,000
GBP
|
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
|
| Liabilities [abstract] | ||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||
| Non-current provisions [abstract] | ||||||||||||||||||||||||
| Non-current provisions |
33,500,000
GBP
|
— | — | — | — | — | — | — |
32,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other non-current payables |
24,900,000
GBP
|
— | — | — | — | — | — | — |
16,300,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities |
540,900,000
GBP
|
— | — | — | — | — | — | — |
532,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities |
2,550,400,000
GBP
|
— | — | — | — | — | — | — |
2,670,600,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||
| Current provisions [abstract] | ||||||||||||||||||||||||
| Current provisions |
38,100,000
GBP
|
— | — | — | — | — | — | — |
30,100,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Trade and other current payables |
635,700,000
GBP
|
— | — | — | — | — | — | — |
661,900,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities |
1,789,200,000
GBP
|
— | — | — | — | — | — | — |
2,008,800,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
4,339,600,000
GBP
|
— | — | — | — | — | — | — |
4,679,400,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |