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 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operations | — |
848,000,000
USD
|
— |
308,000,000
USD
|
907,000,000
USD
|
| Interest paid, classified as operating activities | — |
134,000,000
USD
|
— |
132,000,000
USD
|
110,000,000
USD
|
| Interest received, classified as operating activities | — |
8,000,000
USD
|
— |
2,000,000
USD
|
3,000,000
USD
|
| Income taxes paid (refund), classified as operating activities | — |
86,000,000
USD
|
— |
41,000,000
USD
|
141,000,000
USD
|
| Cash flows from (used in) operating activities | — |
636,000,000
USD
|
— |
137,000,000
USD
|
653,000,000
USD
|
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
–
USD
|
— |
–
USD
|
292,000,000
USD
|
| Other cash receipts from sales of interests in joint ventures, classified as investing activities | — |
–
USD
|
— |
5,000,000
USD
|
–
USD
|
| Other cash payments to acquire interests in joint ventures, classified as investing activities | — |
–
USD
|
— |
2,000,000
USD
|
10,000,000
USD
|
| Purchase of property, plant and equipment, classified as investing activities | — |
17,000,000
USD
|
— |
26,000,000
USD
|
75,000,000
USD
|
| Purchase of intangible assets, classified as investing activities | — |
35,000,000
USD
|
— |
50,000,000
USD
|
104,000,000
USD
|
| Cash receipts from repayment of advances and loans made to other parties, classified as investing activities | — |
14,000,000
USD
|
— |
13,000,000
USD
|
4,000,000
USD
|
| Interest paid, classified as investing activities | — |
–
USD
|
— |
1,000,000
USD
|
5,000,000
USD
|
| Cash flows from (used in) investing activities | — |
12,000,000
USD
|
— |
61,000,000
USD
|
493,000,000
USD
|
| Cash flows from (used in) financing activities [abstract] | |||||
| Payments to acquire or redeem entity's shares | — |
–
USD
|
— |
–
USD
|
5,000,000
USD
|
| Payments of lease liabilities, classified as financing activities | — |
32,000,000
USD
|
— |
65,000,000
USD
|
59,000,000
USD
|
| Dividends paid, classified as financing activities | — |
–
USD
|
— |
–
USD
|
721,000,000
USD
|
| Other inflows (outflows) of cash, classified as financing activities | — |
–
USD
|
— |
125,000,000
USD
|
127,000,000
USD
|
| Cash flows from (used in) financing activities | — |
860,000,000
USD
|
— |
1,354,000,000
USD
|
660,000,000
USD
|
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
236,000,000
USD
|
— |
1,430,000,000
USD
|
500,000,000
USD
|
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents | — |
3,000,000
USD
|
— |
86,000,000
USD
|
8,000,000
USD
|
| Cash and cash equivalents |
1,450,000,000
USD
|
— |
1,675,000,000
USD
|
— | — |