Statement Of Cash Flows [Abstract]
| Concept |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
As at 2018-12-31 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operating activities | — |
2,643,000,000
USD
|
7,514,000,000
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
|
-
USD
|
— | — |
| Proceeds from government grants, classified as investing activities | — |
-
USD
|
-
USD
|
— | — |
| Cash flows from (used in) investing activities | — |
2,896,000,000
USD
|
2,615,000,000
USD
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||
| Payments of lease liabilities, classified as financing activities | — |
555,000,000
USD
|
569,000,000
USD
|
— | — |
| Interest paid, classified as financing activities | — |
802,000,000
USD
|
805,000,000
USD
|
— | — |
| Cash flows from (used in) financing activities | — |
1,480,000,000
USD
|
1,416,000,000
USD
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents | — |
207,000,000
USD
|
43,000,000
USD
|
— | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
2,251,000,000
USD
|
1,764,000,000
USD
|
— | — |
| Cash and cash equivalents |
3,854,000,000
USD
|
— | — |
6,105,000,000
USD
|
4,341,000,000
USD
|