Disclosure Of Income Tax [Text Block]
| 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 |
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 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of income tax [text block] |
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Major components of tax expense (income) [abstract] | ||||||||||||||||||||||
| Tax expense (income) |
440,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
964,000,000
GBP
|
— | — |
| Current and deferred tax relating to items charged or credited directly to equity [abstract] | ||||||||||||||||||||||
| Current and deferred tax relating to items credited (charged) directly to equity |
7,000,000
GBP
|
—
GBP
|
— |
7,000,000
GBP
|
2,000,000
GBP
|
—
GBP
|
9,000,000
GBP
|
—
GBP
|
—
GBP
|
—
GBP
|
— |
—
GBP
|
—
GBP
|
5,000,000
GBP
|
6,000,000
GBP
|
1,000,000
GBP
|
—
GBP
|
6,000,000
GBP
|
—
GBP
|
— |
—
GBP
|
— |
| Income tax relating to components of other comprehensive income [abstract] | ||||||||||||||||||||||
| Income tax relating to remeasurements of defined benefit plans included in other comprehensive income |
28,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
7,000,000
GBP
|
— | — |
| Disclosure of temporary difference, unused tax losses and unused tax credits [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of temporary difference, unused tax losses and unused tax credits [abstract] | ||||||||||||||||||||||
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | ||||||||||||||||||||||
| Deferred tax assets and liabilities [abstract] | ||||||||||||||||||||||
| Deferred tax assets | — | — |
443,000,000
GBP
|
— | — | — | — | — | — | — |
445,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
114,000,000
GBP
|
| Deferred tax liabilities | — | — |
682,000,000
GBP
|
— | — | — | — | — | — | — |
795,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
1,718,000,000
GBP
|
| Reconciliation of accounting profit multiplied by applicable tax rates [abstract] |