Disclosure Of Entity's Operating Segments [Text Block]
| Concept |
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 |
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 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of entity's operating segments [text block] |
4. Segment information
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of operating segments [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of operating segments [abstract] | |||||||||||||||||||||||
| Disclosure of operating segments [line items] | |||||||||||||||||||||||
| Revenue |
11,302,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
10,858,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
9,545,000,000
GBP
|
— |
| Tax expense (income) |
517,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
499,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
197,000,000
GBP
|
— |
| Profit (loss) before tax |
1,628,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,618,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,636,000,000
GBP
|
— |
| Profit (loss) |
1,111,000,000
GBP
|
— |
1,049,000,000
GBP
|
—
GBP
|
62,000,000
GBP
|
1,049,000,000
GBP
|
—
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
1,119,000,000
GBP
|
1,060,000,000
GBP
|
59,000,000
GBP
|
1,060,000,000
GBP
|
—
GBP
|
49,000,000
GBP
|
—
GBP
|
1,390,000,000
GBP
|
—
GBP
|
—
GBP
|
1,439,000,000
GBP
|
1,390,000,000
GBP
|
| Assets | — |
34,055,000,000
GBP
|
— | — | — | — | — | — |
34,815,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — |
17,326,000,000
GBP
|
— | — | — | — | — | — |
18,358,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash flows from (used in) operating activities |
2,100,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
2,063,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,356,000,000
GBP
|
— |
| Cash flows from (used in) investing activities |
134,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
8,784,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
33,000,000
GBP
|
— |
| Cash flows from (used in) financing activities |
1,568,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
6,911,000,000
GBP
|
— | — | — | — | — | — | — | — | — |
1,236,000,000
GBP
|
— |
| Disclosure of products and services [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of products and services [abstract] | |||||||||||||||||||||||
| Disclosure of products and services [line items] | |||||||||||||||||||||||
| Disclosure of geographical areas [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of geographical areas [abstract] | |||||||||||||||||||||||
| Disclosure of geographical areas [line items] | |||||||||||||||||||||||
| Disclosure of major customers [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of major customers [abstract] | |||||||||||||||||||||||
| Disclosure of major customers [line items] |