Statement Of Cash Flows [Abstract]
| Concept |
As at 2024-09-30 |
2023-10-01 to 2024-09-30 |
As at 2023-09-30 |
2022-10-01 to 2023-09-30 |
As at 2022-09-30 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operating activities | — |
2,216,400,000
GBP
|
— |
2,171,700,000
GBP
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows from (used in) investing activities | — |
424,700,000
GBP
|
— |
3,100,000
GBP
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||
| Cash flows from (used in) financing activities | — |
2,260,800,000
GBP
|
— |
1,105,000,000
GBP
|
— |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
469,100,000
GBP
|
— |
1,063,600,000
GBP
|
— |
| Cash and cash equivalents |
2,525,000,000
GBP
|
— |
2,994,100,000
GBP
|
— |
1,930,500,000
GBP
|