Statement Of Cash Flows [Abstract]
| Concept |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||
| Cash flows from (used in) operating activities [abstract] | ||||||
| Interest paid, classified as operating activities | — |
698,000,000
USD
|
— |
730,000,000
USD
|
723,000,000
USD
|
— |
| Interest received, classified as operating activities | — |
96,000,000
USD
|
— |
162,000,000
USD
|
215,000,000
USD
|
— |
| Income taxes paid (refund), classified as operating activities | — |
8,588,000,000
USD
|
— |
3,134,000,000
USD
|
8,286,000,000
USD
|
— |
| Cash flows from (used in) operating activities | — |
28,816,000,000
USD
|
— |
10,386,000,000
USD
|
13,749,000,000
USD
|
— |
| Cash flows from (used in) investing activities [abstract] | ||||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
1,864,000,000
USD
|
— |
505,000,000
USD
|
2,608,000,000
USD
|
— |
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
111,000,000
USD
|
— |
0
USD
|
2,274,000,000
USD
|
— |
| Purchase of property, plant and equipment, classified as investing activities | — |
8,040,000,000
USD
|
— |
8,476,000,000
USD
|
10,204,000,000
USD
|
— |
| Other inflows (outflows) of cash, classified as investing activities | — |
28,000,000
USD
|
— |
202,000,000
USD
|
10,000,000
USD
|
— |
| Cash flows from (used in) investing activities | — |
16,211,000,000
USD
|
— |
12,092,000,000
USD
|
10,594,000,000
USD
|
— |
| Cash flows from (used in) financing activities [abstract] | ||||||
| Payments to acquire or redeem entity's shares | — |
321,000,000
USD
|
— |
1,059,000,000
USD
|
442,000,000
USD
|
— |
| Proceeds from borrowings, classified as financing activities | — |
0
USD
|
— |
8,347,000,000
USD
|
984,000,000
USD
|
— |
| Repayments of borrowings, classified as financing activities | — |
2,675,000,000
USD
|
— |
2,055,000,000
USD
|
1,314,000,000
USD
|
— |
| Payments of lease liabilities, classified as financing activities | — |
1,238,000,000
USD
|
— |
1,277,000,000
USD
|
1,104,000,000
USD
|
— |
| Dividends paid, classified as financing activities | — |
1,797,000,000
USD
|
— |
2,330,000,000
USD
|
3,342,000,000
USD
|
— |
| Other inflows (outflows) of cash, classified as financing activities | — |
1,195,000,000
USD
|
— |
1,365,000,000
USD
|
277,000,000
USD
|
— |
| Cash flows from (used in) financing activities | — |
4,836,000,000
USD
|
— |
2,991,000,000
USD
|
5,496,000,000
USD
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
7,768,000,000
USD
|
— |
1,285,000,000
USD
|
2,341,000,000
USD
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||
| Effect of exchange rate changes on cash and cash equivalents | — |
538,000,000
USD
|
— |
294,000,000
USD
|
38,000,000
USD
|
— |
| Cash and cash equivalents |
14,126,000,000
USD
|
— |
6,757,000,000
USD
|
— | — |
5,177,000,000
USD
|