Statement Of Cash Flows [Abstract]
| Concept |
As at 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2019-04-01 to 2020-03-31 |
As at 2020-03-31 |
2019-04-01 to 2020-03-31 |
2019-04-01 to 2020-03-31 |
2019-04-01 to 2020-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||
| Profit (loss) | — |
803,000,000
USD
|
802,000,000
USD
|
1,000,000
USD
|
803,000,000
USD
|
2,000,000
USD
|
— |
675,000,000
USD
|
675,000,000
USD
|
677,000,000
USD
|
| Cash flows from (used in) operations | — | — |
1,822,000,000
USD
|
— | — | — | — | — | — |
1,694,000,000
USD
|
| Dividends received, classified as operating activities | — | — |
17,000,000
USD
|
— | — | — | — | — | — |
6,000,000
USD
|
| Interest paid, classified as operating activities | — | — |
119,000,000
USD
|
— | — | — | — | — | — |
157,000,000
USD
|
| Interest received, classified as operating activities | — | — |
4,000,000
USD
|
— | — | — | — | — | — |
5,000,000
USD
|
| Income taxes paid (refund), classified as operating activities | — | — |
236,000,000
USD
|
— | — | — | — | — | — |
286,000,000
USD
|
| Cash flows from (used in) operating activities | — | — |
1,488,000,000
USD
|
— | — | — | — | — | — |
1,256,000,000
USD
|
| Cash flows from (used in) investing activities [abstract] | ||||||||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — | — |
526,000,000
USD
|
— | — | — | — | — | — |
600,000,000
USD
|
| Proceeds from sales of property, plant and equipment, classified as investing activities | — | — |
1,000,000
USD
|
— | — | — | — | — | — |
5,000,000
USD
|
| Purchase of property, plant and equipment, classified as investing activities | — | — |
48,000,000
USD
|
— | — | — | — | — | — |
84,000,000
USD
|
| Purchase of intangible assets, classified as investing activities | — | — |
374,000,000
USD
|
— | — | — | — | — | — |
403,000,000
USD
|
| Cash flows from (used in) investing activities | — | — |
827,000,000
USD
|
— | — | — | — | — | — |
1,177,000,000
USD
|
| Cash flows from (used in) financing activities [abstract] | ||||||||||
| Proceeds from issuing shares | — | — |
19,000,000
USD
|
— | — | — | — | — | — |
15,000,000
USD
|
| Payments to acquire or redeem entity's shares | — | — |
—
USD
|
— | — | — | — | — | — |
203,000,000
USD
|
| Proceeds from borrowings, classified as financing activities | — | — |
1,011,000,000
USD
|
— | — | — | — | — | — |
1,519,000,000
USD
|
| Repayments of borrowings, classified as financing activities | — | — |
1,337,000,000
USD
|
— | — | — | — | — | — |
553,000,000
USD
|
| Payments of lease liabilities, classified as financing activities | — | — |
56,000,000
USD
|
— | — | — | — | — | — |
55,000,000
USD
|
| Dividends paid, classified as financing activities | — | — |
428,000,000
USD
|
— | — | — | — | — | — |
426,000,000
USD
|
| Cash flows from (used in) financing activities | — | — |
747,000,000
USD
|
— | — | — | — | — | — |
61,000,000
USD
|
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | — |
86,000,000
USD
|
— | — | — | — | — | — |
140,000,000
USD
|
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — |
16,000,000
USD
|
— | — | — | — | — | — |
14,000,000
USD
|
| Cash and cash equivalents |
180,000,000
USD
|
— | — | — | — | — |
277,000,000
USD
|
— | — | — |