Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-12-31 |
As at 2021-12-31 |
|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||
| Property, plant and equipment [abstract] | ||
| Property, plant and equipment |
110,000,000
GBP
|
123,000,000
GBP
|
| Intangible assets and goodwill [abstract] | ||
| Intangible assets other than goodwill [abstract] | ||
| Other intangible assets |
97,000,000
GBP
|
91,000,000
GBP
|
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||
| Investments in joint ventures reported in separate financial statements |
34,000,000
GBP
|
28,000,000
GBP
|
| Investments in associates reported in separate financial statements |
63,000,000
GBP
|
51,000,000
GBP
|
| Trade and other non-current receivables [abstract] | ||
| Trade and other non-current receivables |
51,000,000
GBP
|
44,000,000
GBP
|
| Miscellaneous non-current assets [abstract] | ||
| Non-current net defined benefit asset |
1,000,000
GBP
|
1,000,000
GBP
|
| Non-current investments other than investments accounted for using equity method |
23,000,000
GBP
|
21,000,000
GBP
|
| Trade and other current receivables [abstract] | ||
| Trade and other current receivables |
2, 198
GBP
|
2,068,000,000
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 |
264,000,000
GBP
|
158,000,000
GBP
|
| Current financial assets |
1 74
GBP
|
115,000,000
GBP
|
| Cash and cash equivalents [abstract] | ||
| Cash and cash equivalents |
888,000,000
GBP
|
784,000,000
GBP
|
| Borrowings [abstract] | ||
| Non-current portion of non-current borrowings |
785,000,000
GBP
|
7 79
GBP
|
| Current borrowings and current portion of non-current borrowings [abstract] | ||
| Current borrowings |
9,000,000
GBP
|
77,000,000
GBP
|
| Non-current portion of non-current borrowings, by type [abstract] | ||
| Trade and other non-current payables [abstract] | ||
| Trade and other non-current payables |
60,000,000
GBP
|
53,000,000
GBP
|
| Trade and other current payables [abstract] | ||
| Trade and other current payables |
2, 149
GBP
|
1,9 7 7
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 |
255,000,000
GBP
|
120,000,000
GBP
|
| Miscellaneous non-current liabilities [abstract] | ||
| Non-current net defined benefit liability |
3,000,000
GBP
|
1,000,000
GBP
|
| Miscellaneous current liabilities [abstract] | ||
| Current derivative financial liabilities |
–
GBP
|
1,000,000
GBP
|
| Issued capital [abstract] | ||
| Issued capital |
197,000,000
GBP
|
197,000,000
GBP
|
| Retained earnings [abstract] | ||
| Retained earnings |
2,800,000,000
GBP
|
2 ,7 6 9
GBP
|
| Net assets (liabilities) [abstract] | ||
| Assets |
5, 863
GBP
|
5 ,450
GBP
|
| Liabilities |
3,70 2
GBP
|
3 ,472
GBP
|
| Assets (liabilities) |
2, 161
GBP
|
1 ,9 7 8
GBP
|
| Net current assets (liabilities) [abstract] | ||
| Current assets |
3,5 24
GBP
|
3 , 125
GBP
|
| Current liabilities |
2, 488
GBP
|
2,242,000,000
GBP
|
| Current assets (liabilities) |
1,03 6
GBP
|
883,000,000
GBP
|
| Assets less current liabilities [abstract] |