Disclosure Of Cash Flow Statement [Text Block]
| Concept |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|
| Disclosure of cash flow statement [text block] | — | — | — | — | — | — | — |
| Description of accounting policy for determining components of cash and cash equivalents [text block] |
Cash and cash equivalents include cash in hand, short-term bank deposits and other short-term highly liquid investments with original maturities
|
— | — | — | — | — | — |
| Cash and cash equivalents if different from statement of financial position [abstract] | |||||||
| Cash and cash equivalents | — |
1,562,000,000
GBP
|
2,170,000,000
GBP
|
— | — | — | — |
| Cash and cash equivalents if different from statement of financial position | — |
832,000,000
GBP
|
879,000,000
GBP
|
— |
242,000,000
GBP
|
— |
551,000,000
GBP
|
| Income taxes paid (refund) [abstract] | |||||||
| Income taxes paid (refund), classified as operating activities |
100,000,000
GBP
|
— | — |
77,000,000
GBP
|
— |
69,000,000
GBP
|
— |