Analysis Of Income And Expense [Abstract]
| Concept |
2021-04-04 to 2022-04-02 |
2021-04-04 to 2022-04-02 |
2021-04-04 to 2022-04-02 |
2021-04-04 to 2022-04-02 |
2021-04-04 to 2022-04-02 |
2021-04-04 to 2022-04-02 |
2020-03-29 to 2021-04-03 |
2020-03-29 to 2021-04-03 |
2020-03-29 to 2021-04-03 |
2020-03-29 to 2021-04-03 |
2020-03-29 to 2021-04-03 |
2020-03-29 to 2021-04-03 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||
| Revenue [abstract] | ||||||||||||
| Revenue | — | — | — |
900,500,000
GBP
|
— | — | — | — | — | — |
947,000,000
GBP
|
— |
| Material income and expense [abstract] | ||||||||||||
| Gains (losses) on disposals of investments [abstract] | ||||||||||||
| Gains (losses) on disposals of investments | — | — | — |
–
GBP
|
— | — | — | — | — | — |
16,900,000
GBP
|
— |
| Miscellaneous other comprehensive income [abstract] | ||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations |
400,000
GBP
|
–
GBP
|
–
GBP
|
400,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
1,000,000
GBP
|
–
GBP
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||
| Comprehensive income |
326,600,000
GBP
|
–
GBP
|
–
GBP
|
326,600,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
503,200,000
GBP
|
–
GBP
|
503,200,000
GBP
|
–
GBP
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — |
326,600,000
GBP
|
— | — | — | — | — | — |
503,200,000
GBP
|
— |