Disclosure Of Employee Benefits [Text Block]
| Concept |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of employee benefits [text block] | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of information about defined benefit plans [abstract] | |||||||||||
| Disclosure of defined benefit plans [text block] | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of defined benefit plans [abstract] | |||||||||||
| Disclosure of defined benefit plans [line items] | |||||||||||
| Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans [abstract] | |||||||||||
| Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans |
845,000,000
GBP
|
845,000,000
GBP
|
845,000,000
GBP
|
370,000,000
GBP
|
372,000,000
GBP
|
2,000,000
GBP
|
370,000,000
GBP
|
393,000,000
GBP
|
393,000,000
GBP
|
391,000,000
GBP
|
2,000,000
GBP
|
| Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans [abstract] | |||||||||||
| Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans | — |
1,264,000,000
GBP
|
— | — |
505,000,000
GBP
|
— | — | — | — |
522,000,000
GBP
|
— |