Statement Of Comprehensive Income [Abstract]
| Concept |
2021-07-01 to 2022-06-30 |
2021-07-01 to 2022-06-30 |
2021-07-01 to 2022-06-30 |
2021-07-01 to 2022-06-30 |
2021-07-01 to 2022-06-30 |
2021-07-01 to 2022-06-30 |
2020-07-01 to 2021-06-30 |
2020-07-01 to 2021-06-30 |
2020-07-01 to 2021-06-30 |
2020-07-01 to 2021-06-30 |
2020-07-01 to 2021-06-30 |
2020-07-01 to 2021-06-30 |
2019-07-01 to 2020-06-30 |
2019-07-01 to 2020-06-30 |
2019-07-01 to 2020-06-30 |
2019-07-01 to 2020-06-30 |
2019-07-01 to 2020-06-30 |
2019-07-01 to 2020-06-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||||
| Profit (loss) |
3,338,000,000
GBP
|
3,249,000,000
GBP
|
— |
3,249,000,000
GBP
|
89,000,000
GBP
|
3,249,000,000
GBP
|
2,799,000,000
GBP
|
2,660,000,000
GBP
|
139,000,000
GBP
|
— |
2,660,000,000
GBP
|
2,660,000,000
GBP
|
— |
1,454,000,000
GBP
|
1,409,000,000
GBP
|
1,409,000,000
GBP
|
1,409,000,000
GBP
|
45,000,000
GBP
|
| Other comprehensive income [abstract] | ||||||||||||||||||
| Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||
| Other comprehensive income, before tax, gains (losses) from investments in equity instruments |
12,000,000
GBP
|
— | — | — | — | — |
—
GBP
|
— | — | — | — | — | — |
—
GBP
|
— | — | — | — |
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||||||||
| Hedges of net investment in foreign operations [abstract] | ||||||||||||||||||
| Other comprehensive income, before tax, hedges of net investments in foreign operations |
623,000,000
GBP
|
— | — | — | — | — |
810,000,000
GBP
|
— | — | — | — | — | — |
227,000,000
GBP
|
— | — | — | — |
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract] | ||||||||||||||||||
| Income tax relating to remeasurements of defined benefit plans included in other comprehensive income |
123,000,000
GBP
|
— | — | — | — | — |
46,000,000
GBP
|
— | — | — | — | — | — |
21,000,000
GBP
|
— | — | — | — |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract] | ||||||||||||||||||
| Income tax relating to cash flow hedges included in other comprehensive income |
32,000,000
GBP
|
— | — | — | — | — |
6,000,000
GBP
|
— | — | — | — | — | — |
23,000,000
GBP
|
— | — | — | — |
| Other comprehensive income |
1,482,000,000
GBP
|
1,312,000,000
GBP
|
535,000,000
GBP
|
777,000,000
GBP
|
170,000,000
GBP
|
777,000,000
GBP
|
865,000,000
GBP
|
39,000,000
GBP
|
174,000,000
GBP
|
652,000,000
GBP
|
691,000,000
GBP
|
39,000,000
GBP
|
116,000,000
GBP
|
164,000,000
GBP
|
127,000,000
GBP
|
11,000,000
GBP
|
11,000,000
GBP
|
37,000,000
GBP
|
| Comprehensive income |
4,820,000,000
GBP
|
4,561,000,000
GBP
|
535,000,000
GBP
|
4,026,000,000
GBP
|
259,000,000
GBP
|
4,026,000,000
GBP
|
1,934,000,000
GBP
|
2,621,000,000
GBP
|
35,000,000
GBP
|
652,000,000
GBP
|
1,969,000,000
GBP
|
2,621,000,000
GBP
|
116,000,000
GBP
|
1,290,000,000
GBP
|
1,282,000,000
GBP
|
1,398,000,000
GBP
|
1,398,000,000
GBP
|
8,000,000
GBP
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent |
4,561,000,000
GBP
|
— | — | — | — | — |
1,969,000,000
GBP
|
— | — | — | — | — | — |
1,282,000,000
GBP
|
— | — | — | — |
| Comprehensive income, attributable to non-controlling interests |
259,000,000
GBP
|
— | — | — | — | — |
35,000,000
GBP
|
— | — | — | — | — | — |
8,000,000
GBP
|
— | — | — | — |