Statement Of Changes In Equity [Abstract]
| Concept |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||
| Increase (decrease) through acquisition of subsidiary, equity |
16,000,000
USD
|
19,000,000
USD
|
-
USD
|
-
USD
|
-
USD
|
19,000,000
USD
|
3,000,000
USD
|
-
USD
|
14,000,000
USD
|
-
USD
|
288,000,000
USD
|
-
USD
|
302,000,000
USD
|
-
USD
|
14,000,000
USD
|
-
USD
|
| Increase (decrease) through disposal of subsidiary, equity |
-
USD
|
1,000,000
USD
|
-
USD
|
-
USD
|
-
USD
|
1,000,000
USD
|
1,000,000
USD
|
-
USD
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through transactions with owners, equity |
11,000,000
USD
|
2,831,000,000
USD
|
-
USD
|
119,000,000
USD
|
-
USD
|
2,953,000,000
USD
|
2,964,000,000
USD
|
3,000,000
USD
|
1,064,000,000
USD
|
142,000,000
USD
|
991,000,000
USD
|
-
USD
|
218,000,000
USD
|
-
USD
|
1,209,000,000
USD
|
3,000,000
USD
|
| Purchase of treasury shares |
-
USD
|
1,956,000,000
USD
|
-
USD
|
-
USD
|
-
USD
|
1,956,000,000
USD
|
1,956,000,000
USD
|
-
USD
|
806,000,000
USD
|
-
USD
|
806,000,000
USD
|
-
USD
|
-
USD
|
-
USD
|
806,000,000
USD
|
-
USD
|
| Sale or issue of treasury shares |
-
USD
|
22,000,000
USD
|
-
USD
|
-
USD
|
-
USD
|
22,000,000
USD
|
22,000,000
USD
|
-
USD
|
30,000,000
USD
|
-
USD
|
30,000,000
USD
|
-
USD
|
-
USD
|
-
USD
|
30,000,000
USD
|
-
USD
|