Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-03-31 |
As at 2023-03-31 |
As at 2022-03-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill |
3,000,000
GBP
|
6,000,000
GBP
|
— |
| Investment property [abstract] | |||
| Investment property |
9,330,000,000
GBP
|
9,658,000,000
GBP
|
— |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in subsidiaries reported in separate financial statements |
–
GBP
|
–
GBP
|
— |
| Investments in joint ventures reported in separate financial statements |
529,000,000
GBP
|
533,000,000
GBP
|
— |
| Investments in associates reported in separate financial statements |
–
GBP
|
3,000,000
GBP
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
159,000,000
GBP
|
146,000,000
GBP
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current finance lease receivables |
21,000,000
GBP
|
21,000,000
GBP
|
— |
| Other non-current assets |
48,000,000
GBP
|
67,000,000
GBP
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
379,000,000
GBP
|
365,000,000
GBP
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
100,000,000
GBP
|
118,000,000
GBP
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
78,000,000
GBP
|
41,000,000
GBP
|
146,000,000
GBP
|
| Miscellaneous current assets [abstract] | |||
| Other current assets |
11,000,000
GBP
|
4,000,000
GBP
|
— |
| Miscellaneous assets [abstract] | |||
| Restricted cash and cash equivalents |
6,000,000
GBP
|
4,000,000
GBP
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
2,805,000,000
GBP
|
3,223,000,000
GBP
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
975,000,000
GBP
|
315,000,000
GBP
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other non-current payables [abstract] | |||
| Trade and other non-current payables |
4,000,000
GBP
|
17,000,000
GBP
|
— |
| Trade and other current payables [abstract] | |||
| Trade and other current payables |
348,000,000
GBP
|
306,000,000
GBP
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Other non-current liabilities |
13,000,000
GBP
|
9,000,000
GBP
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Other current liabilities |
–
GBP
|
24,000,000
GBP
|
— |
| Issued capital [abstract] | |||
| Issued capital |
80,000,000
GBP
|
80,000,000
GBP
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
5,980,000,000
GBP
|
6,594,000,000
GBP
|
— |
| Miscellaneous equity [abstract] | |||
| Merger reserve |
–
GBP
|
–
GBP
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
10,664,000,000
GBP
|
10,966,000,000
GBP
|
— |
| Liabilities |
4,217,000,000
GBP
|
3,894,000,000
GBP
|
— |
| Assets (liabilities) |
6,447,000,000
GBP
|
7,072,000,000
GBP
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
574,000,000
GBP
|
532,000,000
GBP
|
— |
| Current liabilities |
1,353,000,000
GBP
|
645,000,000
GBP
|
— |
| Assets less current liabilities [abstract] |