Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 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 |
As at 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 |
As at 2021-12-31 |
As at 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 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 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 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||||||
| Equity | — |
6,141,000,000
USD
|
41,716,000,000
USD
|
651,000,000
USD
|
— | — | — |
34,770,000,000
USD
|
— | — |
3,295,000,000
USD
|
— |
27,825,000,000
USD
|
6,945,000,000
USD
|
— |
11,696,000,000
USD
|
— | — | — |
37,192,000,000
USD
|
6,942,000,000
USD
|
— |
25,824,000,000
USD
|
— | — |
5,107,000,000
USD
|
6,107,000,000
USD
|
11,004,000,000
USD
|
636,000,000
USD
|
— |
32,766,000,000
USD
|
— | — | — | — | — |
24,795,000,000
USD
|
6,590,000,000
USD
|
570,000,000
USD
|
10,965,000,000
USD
|
31,385,000,000
USD
|
36,274,000,000
USD
|
5,111,000,000
USD
|
6,195,000,000
USD
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
3,137,000,000
USD
|
— | — | — |
—
USD
|
—
USD
|
8,562,000,000
USD
|
— |
306,000,000
USD
|
12,005,000,000
USD
|
— |
—
USD
|
— | — |
—
USD
|
— |
11,699,000,000
USD
|
8,562,000,000
USD
|
3,328,000,000
USD
|
— | — |
—
USD
|
— |
2,089,000,000
USD
|
—
USD
|
— | — | — | — |
—
USD
|
— |
—
USD
|
1,239,000,000
USD
|
2,089,000,000
USD
|
974,000,000
USD
|
4,302,000,000
USD
|
— | — | — | — | — | — | — | — |
| Other comprehensive income |
267,000,000
USD
|
— | — | — |
—
USD
|
8,000,000
USD
|
619,000,000
USD
|
— | — | — | — |
692,000,000
USD
|
— | — |
—
USD
|
— |
886,000,000
USD
|
81,000,000
USD
|
25,000,000
USD
|
— | — |
—
USD
|
— |
—
USD
|
—
USD
|
— | — | — | — |
49,000,000
USD
|
— |
39,000,000
USD
|
35,000,000
USD
|
10,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
10,813,000,000
USD
|
— |
3,303,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
2,837,000,000
USD
|
— | — | — |
—
USD
|
—
USD
|
4,047,000,000
USD
|
— | — | — | — |
—
USD
|
— | — |
—
USD
|
— |
6,884,000,000
USD
|
4,047,000,000
USD
|
1,714,000,000
USD
|
— | — |
—
USD
|
— |
904,000,000
USD
|
—
USD
|
— | — | — | — |
—
USD
|
— |
—
USD
|
810,000,000
USD
|
904,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Decrease through other distributions to owners, equity |
106,000,000
USD
|
— | — | — |
—
USD
|
—
USD
|
719,000,000
USD
|
— | — | — | — |
—
USD
|
— | — |
1,800,000,000
USD
|
— |
825,000,000
USD
|
1,081,000,000
USD
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
16,000,000
USD
|
— | — | — |
37,000,000
USD
|
4,000,000
USD
|
37,000,000
USD
|
— | — | — | — |
—
USD
|
— | — |
—
USD
|
— |
53,000,000
USD
|
70,000,000
USD
|
13,000,000
USD
|
— | — |
1,000,000
USD
|
— |
7,000,000
USD
|
—
USD
|
— | — | — | — |
8,000,000
USD
|
— |
—
USD
|
15,000,000
USD
|
2,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity |
—
USD
|
— | — | — |
—
USD
|
—
USD
|
1,000,000,000
USD
|
— | — | — | — |
—
USD
|
— | — |
—
USD
|
— |
1,000,000,000
USD
|
1,000,000,000
USD
|
223,000,000
USD
|
— | — |
—
USD
|
— |
223,000,000
USD
|
—
USD
|
— | — | — | — |
—
USD
|
— |
—
USD
|
—
USD
|
223,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
89,000,000
USD
|
— | — | — |
—
USD
|
—
USD
|
73,000,000
USD
|
— | — | — | — |
—
USD
|
— | — |
—
USD
|
— |
16,000,000
USD
|
73,000,000
USD
|
14,000,000
USD
|
— | — |
—
USD
|
— |
44,000,000
USD
|
—
USD
|
— | — | — | — |
—
USD
|
— |
—
USD
|
58,000,000
USD
|
44,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
3,000,000
USD
|
— | — | — |
71,000,000
USD
|
15,000,000
USD
|
66,000,000
USD
|
— | — | — | — |
—
USD
|
— | — |
—
USD
|
— |
63,000,000
USD
|
10,000,000
USD
|
16,000,000
USD
|
— | — |
89,000,000
USD
|
— |
95,000,000
USD
|
—
USD
|
— | — | — | — |
21,000,000
USD
|
— |
—
USD
|
1,000,000
USD
|
15,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |