Analysis Of Income And Expense [Abstract]
| Concept |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||||||||
| Revenue [abstract] | ||||||||||||||||||||||||
| Revenue | — | — |
10,858,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
9,545,000,000
GBP
|
— |
9,892,000,000
GBP
|
— | — | — | — | — | — | — |
| Material income and expense [abstract] | ||||||||||||||||||||||||
| Research and development expense | — | — |
300,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
257,000,000
GBP
|
— |
304,000,000
GBP
|
— | — | — | — | — | — | — |
| Finance income (cost) | — | — |
207,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
2,000,000
GBP
|
— |
7,000,000
GBP
|
— | — | — | — | — | — | — |
| Other operating income (expense) | — | — |
31,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
31,000,000
GBP
|
— |
212,000,000
GBP
|
— | — | — | — | — | — | — |
| Selling, general and administrative expense [abstract] | ||||||||||||||||||||||||
| Selling, general and administrative expense | — | — |
4,483,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
4,086,000,000
GBP
|
— |
4,220,000,000
GBP
|
— | — | — | — | — | — | — |
| Miscellaneous other comprehensive income [abstract] | ||||||||||||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations | — | — |
598,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
34,000,000
GBP
|
— |
170,000,000
GBP
|
— | — | — | — | — | — | — |
| Income tax relating to components of other comprehensive income [abstract] | ||||||||||||||||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss | — | — |
29,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
12,000,000
GBP
|
— |
13,000,000
GBP
|
— | — | — | — | — | — | — |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — | — |
44,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
2,000,000
GBP
|
— |
–
GBP
|
— | — | — | — | — | — | — |
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||||||||
| 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
|
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — |
1,894,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
1,380,000,000
GBP
|
— |
975,000,000
GBP
|
— | — | — | — | — | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — |
49,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
49,000,000
GBP
|
— |
37,000,000
GBP
|
— | — | — | — | — | — | — |