Statement Of Cash Flows [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Dividends received, classified as operating activities |
1,917,000,000
GBP
|
— |
2,364,000,000
GBP
|
— | — |
| Interest paid, classified as operating activities |
359,000,000
GBP
|
— |
204,000,000
GBP
|
— | — |
| Interest received, classified as operating activities |
3,312,000,000
GBP
|
— |
3,086,000,000
GBP
|
— | — |
| Income taxes paid (refund), classified as operating activities |
514,000,000
GBP
|
— |
250,000,000
GBP
|
— | — |
| Cash flows from (used in) operating activities |
677,000,000
GBP
|
— |
1,719,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities |
451,000,000
GBP
|
— |
105,000,000
GBP
|
— | — |
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities |
31,000,000
GBP
|
— |
103,000,000
GBP
|
— | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities |
21,000,000
GBP
|
— |
1,000,000
GBP
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities |
289,000,000
GBP
|
— |
496,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities |
152,000,000
GBP
|
— |
603,000,000
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from issuing shares |
5,000,000
GBP
|
— |
9,000,000
GBP
|
— | — |
| Payments of lease liabilities, classified as financing activities |
28,000,000
GBP
|
— |
25,000,000
GBP
|
— | — |
| Interest paid, classified as financing activities |
188,000,000
GBP
|
— |
189,000,000
GBP
|
— | — |
| Cash flows from (used in) financing activities |
1,142,000,000
GBP
|
— |
680,000,000
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
313,000,000
GBP
|
— |
436,000,000
GBP
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents |
3,000,000
GBP
|
— |
27,000,000
GBP
|
— | — |
| Cash and cash equivalents | — |
4,838,000,000
GBP
|
— |
5,148,000,000
GBP
|
4,739,000,000
GBP
|