Statement Of Cash Flows [Abstract]
| Concept |
2020-04-01 to 2021-03-31 |
2019-04-01 to 2020-03-31 |
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) investing activities [abstract] | ||
| Proceeds from sales of interests in associates |
127,000,000
USD
|
—
USD
|
| Purchase of financial instruments, classified as investing activities |
31,000,000
USD
|
95,000,000
USD
|
| Proceeds from sales or maturity of financial instruments, classified as investing activities |
24,000,000
USD
|
—
USD
|