Statement Of Cash Flows [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||||||||||||||
| Profit (loss) |
1,106,000,000
GBP
|
—
GBP
|
— |
1,085,000,000
GBP
|
—
GBP
|
21,000,000
GBP
|
1,085,000,000
GBP
|
—
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
1,030,000,000
GBP
|
1,051,000,000
GBP
|
21,000,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
— |
1,051,000,000
GBP
|
— |
| Cash flows from (used in) operations |
2,664,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
16,093,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Dividends received, classified as operating activities |
3,999,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
4,347,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Interest received, classified as operating activities |
5,560,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
4,335,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Income taxes paid (refund), classified as operating activities |
68,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
210,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) operating activities |
2,732,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
15,883,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||||||||||||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities |
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
275,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities |
—
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
35,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Purchase of property, plant and equipment, classified as investing activities |
149,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
16,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Purchase of intangible assets, classified as investing activities |
201,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
83,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) investing activities |
350,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
339,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||||||||||||||
| Proceeds from issuing shares |
8,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
17,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Proceeds from borrowings, classified as financing activities |
941,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
659,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Repayments of borrowings, classified as financing activities |
1,181,000,000
GBP
|
— | — | — | — | — | — | — | — |
531,000,000
GBP
|
— | — | — | — | — |
1,554,000,000
GBP
|
— | — | — | — | — | — |
1,002,000,000
GBP
|
— | — |
| Payments of lease liabilities, classified as financing activities |
62,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
63,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Dividends paid, classified as financing activities |
878,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
828,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Interest paid, classified as financing activities |
206,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
450,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash flows from (used in) financing activities |
1,820,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
5,939,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes |
4,902,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
9,605,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||||||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents |
22,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
93,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — |
17,273,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
22,505,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
12,485,000,000
GBP
|