Disclosure Of Effect Of Changes In Foreign Exchange Rates [Text Block]
| Concept |
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 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 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 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of effect of changes in foreign exchange rates [text block] | — | — | — |
Foreign exchange sensitivity
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Reserve of exchange differences on translation |
1,046,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
448,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of information when currency is not exchangeable into another currency [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of information when foreign operation’s functional currency is not exchangeable into presentation currency [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of summarised financial information about foreign operation [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of summarised financial information about foreign operation [abstract] | ||||||||||||||||||||||||||
| Disclosure of summarised financial information about foreign operation [line items] | ||||||||||||||||||||||||||
| Non-current assets |
30,756,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
29,200,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current assets |
4,059,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
5,251,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities |
13,988,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
3,733,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Current liabilities |
4,370,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
4,238,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Revenue | — | — | — |
10,858,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — | — |
9,545,000,000
GBP
|
— |
9,892,000,000
GBP
|
— | — | — | — | — | — | — |
| Profit (loss) | — |
–
GBP
|
–
GBP
|
1,119,000,000
GBP
|
1,060,000,000
GBP
|
59,000,000
GBP
|
1,060,000,000
GBP
|
–
GBP
|
–
GBP
|
49,000,000
GBP
|
–
GBP
|
1,390,000,000
GBP
|
— |
–
GBP
|
–
GBP
|
–
GBP
|
1,439,000,000
GBP
|
1,390,000,000
GBP
|
1,181,000,000
GBP
|
1,145,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
36,000,000
GBP
|
–
GBP
|
1,145,000,000
GBP
|
| Other comprehensive income | — |
–
GBP
|
142,000,000
GBP
|
824,000,000
GBP
|
94,000,000
GBP
|
10,000,000
GBP
|
834,000,000
GBP
|
–
GBP
|
598,000,000
GBP
|
–
GBP
|
9,000,000
GBP
|
10,000,000
GBP
|
— |
–
GBP
|
34,000,000
GBP
|
–
GBP
|
10,000,000
GBP
|
15,000,000
GBP
|
169,000,000
GBP
|
–
GBP
|
–
GBP
|
–
GBP
|
170,000,000
GBP
|
1,000,000
GBP
|
–
GBP
|
170,000,000
GBP
|
| Comprehensive income | — |
–
GBP
|
142,000,000
GBP
|
1,943,000,000
GBP
|
1,154,000,000
GBP
|
49,000,000
GBP
|
1,894,000,000
GBP
|
–
GBP
|
598,000,000
GBP
|
49,000,000
GBP
|
9,000,000
GBP
|
1,380,000,000
GBP
|
— |
–
GBP
|
34,000,000
GBP
|
–
GBP
|
1,429,000,000
GBP
|
1,405,000,000
GBP
|
1,012,000,000
GBP
|
1,145,000,000
GBP
|
–
GBP
|
–
GBP
|
170,000,000
GBP
|
37,000,000
GBP
|
–
GBP
|
975,000,000
GBP
|