Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2020-01-01 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
123,000,000
GBP
|
101,000,000
GBP
|
72,000,000
GBP
|
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Other intangible assets |
91,000,000
GBP
|
58,000,000
GBP
|
61,000,000
GBP
|
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in joint ventures reported in separate financial statements |
28,000,000
GBP
|
29,000,000
GBP
|
28,000,000
GBP
|
| Investments in associates reported in separate financial statements |
51,000,000
GBP
|
61,000,000
GBP
|
58,000,000
GBP
|
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
44,000,000
GBP
|
24,000,000
GBP
|
26,000,000
GBP
|
| Miscellaneous non-current assets [abstract] | |||
| Non-current net defined benefit asset |
1,000,000
GBP
|
–
GBP
|
–
GBP
|
| Non-current investments other than investments accounted for using equity method |
21,000,000
GBP
|
18,000,000
GBP
|
20,000,000
GBP
|
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
2, 068
GBP
|
1,549,000,000
GBP
|
1, 089
GBP
|
| Categories of current financial assets [abstract] | |||
| Current financial assets at fair value through profit or loss [abstract] | |||
| Current financial assets at fair value through profit or loss |
158,000,000
GBP
|
383,000,000
GBP
|
171,000,000
GBP
|
| Current financial assets |
11 5
GBP
|
127,000,000
GBP
|
14 8
GBP
|
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
784,000,000
GBP
|
656,000,000
GBP
|
676,000,000
GBP
|
| Miscellaneous current assets [abstract] | |||
| Current derivative financial assets |
–
GBP
|
3,000,000
GBP
|
–
GBP
|
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
779,000,000
GBP
|
6 79
GBP
|
67 8
GBP
|
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
77,000,000
GBP
|
4 6
GBP
|
11,000,000
GBP
|
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other non-current payables [abstract] | |||
| Trade and other non-current payables |
53,000,000
GBP
|
23,000,000
GBP
|
21,000,000
GBP
|
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
1,9 7 7
GBP
|
1 ,451
GBP
|
1 , 030
GBP
|
| Categories of current financial liabilities [abstract] | |||
| Current financial liabilities at fair value through profit or loss [abstract] | |||
| Current financial liabilities at fair value through profit or loss |
120,000,000
GBP
|
381,000,000
GBP
|
16 4
GBP
|
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
1,000,000
GBP
|
2,000,000
GBP
|
2,000,000
GBP
|
| Miscellaneous current liabilities [abstract] | |||
| Current derivative financial liabilities |
1,000,000
GBP
|
–
GBP
|
–
GBP
|
| Issued capital [abstract] | |||
| Issued capital |
197,000,000
GBP
|
141,000,000
GBP
|
141,000,000
GBP
|
| Retained earnings [abstract] | |||
| Retained earnings |
2 , 76 9
GBP
|
1, 3 8 3
GBP
|
1 ,375
GBP
|
| Miscellaneous equity [abstract] | |||
| Merger reserve |
–
GBP
|
1, 3 8 4
GBP
|
1, 3 8 4
GBP
|
| Net assets (liabilities) [abstract] | |||
| Assets |
5,450,000,000
GBP
|
4,6 3 9
GBP
|
3 ,9 5 4
GBP
|
| Liabilities |
3,472,000,000
GBP
|
2, 941
GBP
|
2,224,000,000
GBP
|
| Assets (liabilities) |
1,9 7 8
GBP
|
1,6 9 8
GBP
|
1 , 730
GBP
|
| Net current assets (liabilities) [abstract] | |||
| Current assets |
3, 125
GBP
|
2, 718
GBP
|
2, 084
GBP
|
| Current liabilities |
2,242,000,000
GBP
|
1 , 949
GBP
|
1 ,297
GBP
|
| Current assets (liabilities) |
883,000,000
GBP
|
769,000,000
GBP
|
787,000,000
GBP
|
| Assets less current liabilities [abstract] |