Disclosure Of Cash Flow Statement [Text Block]
| 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 |
|---|---|---|---|---|---|---|---|---|---|
| Disclosure of cash flow statement [text block] | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents if different from statement of financial position [abstract] | |||||||||
| 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
|
| Income taxes paid (refund) [abstract] | |||||||||
| Income taxes paid (refund), classified as operating activities | — |
285,000,000
USD
|
— |
381,000,000
USD
|
— | — | — |
577,000,000
USD
|
— |