Statement Of Cash Flows [Abstract]
| Concept |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-01-01 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
As at 2019-01-01 |
As at 2018-12-31 |
2018-01-01 to 2018-12-31 |
As at 2018-01-01 |
|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||
| Cash flows from (used in) operations | — |
2,566,000,000
USD
|
— |
3,004,000,000
USD
|
— | — | — |
3,318,000,000
USD
|
— |
| Income taxes paid (refund), classified as operating activities | — |
285,000,000
USD
|
— |
381,000,000
USD
|
— | — | — |
577,000,000
USD
|
— |
| Cash flows from (used in) operating activities | — |
2,281,000,000
USD
|
— |
2,623,000,000
USD
|
— | — | — |
2,741,000,000
USD
|
— |
| Cash flows from (used in) investing activities [abstract] | |||||||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
4,000,000
USD
|
— | — | — | — | — |
4,000,000
USD
|
— |
| Other cash payments to acquire interests in joint ventures, classified as investing activities | — |
131,000,000
USD
|
— |
155,000,000
USD
|
— | — | — | — | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
15,000,000
USD
|
— |
1,000,000
USD
|
— | — | — |
3,000,000
USD
|
— |
| Cash advances and loans made to other parties, classified as investing activities | — |
51,000,000
USD
|
— |
164,000,000
USD
|
— | — | — |
91,000,000
USD
|
— |
| Cash receipts from repayment of advances and loans made to other parties, classified as investing activities | — |
142,000,000
USD
|
— |
115,000,000
USD
|
— | — | — | — | — |
| Interest received, classified as investing activities | — |
10,000,000
USD
|
— |
29,000,000
USD
|
— | — | — |
22,000,000
USD
|
— |
| Cash flows from (used in) investing activities | — |
1,132,000,000
USD
|
— |
1,411,000,000
USD
|
— | — | — |
290,000,000
USD
|
— |
| Cash flows from (used in) financing activities [abstract] | |||||||||
| Proceeds from borrowings, classified as financing activities | — |
2,002,000,000
USD
|
— |
1,015,000,000
USD
|
— | — | — |
470,000,000
USD
|
— |
| Repayments of borrowings, classified as financing activities | — |
1,284,000,000
USD
|
— |
500,000,000
USD
|
— | — | — |
643,000,000
USD
|
— |
| Payments of lease liabilities, classified as financing activities | — |
20,000,000
USD
|
— |
14,000,000
USD
|
— | — | — | — | — |
| Interest paid, classified as financing activities | — |
64,000,000
USD
|
— |
49,000,000
USD
|
— | — | — |
56,000,000
USD
|
— |
| Other inflows (outflows) of cash, classified as financing activities | — |
16,000,000
USD
|
— | — | — | — | — | — | — |
| Cash flows from (used in) financing activities | — |
1,020,000,000
USD
|
— |
1,668,000,000
USD
|
— | — | — |
2,119,000,000
USD
|
— |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
129,000,000
USD
|
— |
456,000,000
USD
|
— | — | — |
912,000,000
USD
|
— |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — | — |
10,000,000
USD
|
— | — | — |
34,000,000
USD
|
— |
| Cash and cash equivalents |
842,000,000
USD
|
— |
713,000,000
USD
|
— |
713,000,000
USD
|
1,179,000,000
USD
|
1,179,000,000
USD
|
— |
301,000,000
USD
|