Statement Of Cash Flows [Abstract]
| Concept |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2019-12-31 |
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) operating activities | — |
7,828,000,000
USD
|
— |
5,919,000,000
USD
|
| Cash flows from (used in) investing activities [abstract] | ||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
36,000,000
USD
|
— |
40,000,000
USD
|
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
425,000,000
USD
|
— |
44,000,000
USD
|
| Dividends received, classified as investing activities | — |
177,000,000
USD
|
— |
297,000,000
USD
|
| Cash flows from (used in) investing activities | — |
1,024,000,000
USD
|
— |
874,000,000
USD
|
| Cash flows from (used in) financing activities [abstract] | ||||
| Proceeds from changes in ownership interests in subsidiaries that do not result in loss of control | — |
-
USD
|
— |
-
USD
|
| Payments from changes in ownership interests in subsidiaries that do not result in loss of control | — |
14,000,000
USD
|
— |
1,000,000
USD
|
| Payments to acquire or redeem entity's shares | — |
806,000,000
USD
|
— |
791,000,000
USD
|
| Proceeds from borrowings, classified as financing activities | — |
1,303,000,000
USD
|
— |
1,077,000,000
USD
|
| Repayments of borrowings, classified as financing activities | — |
3,163,000,000
USD
|
— |
2,533,000,000
USD
|
| Payments of lease liabilities, classified as financing activities | — |
1,710,000,000
USD
|
— |
1,291,000,000
USD
|
| Other inflows (outflows) of cash, classified as financing activities | — |
24,000,000
USD
|
— |
14,000,000
USD
|
| Cash flows from (used in) financing activities | — |
5,618,000,000
USD
|
— |
4,800,000,000
USD
|
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
1,186,000,000
USD
|
— |
1,621,000,000
USD
|
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||
| Effect of exchange rate changes on cash and cash equivalents | — |
80,000,000
USD
|
— |
12,000,000
USD
|
| Cash and cash equivalents |
5,865,000,000
USD
|
— |
4,768,000,000
USD
|
— |