Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
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As at 2019-12-31 |
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As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-01-01 |
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As at 2018-01-01 |
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| Disclosure of fair value measurement [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [abstract] | ||||||||||||||||||||||||
| Disclosure of fair value measurement of assets [line items] | ||||||||||||||||||||||||
| Assets | — | — | — | — | — |
9,862,000,000
USD
|
— | — |
10,484,000,000
USD
|
— | — | — | — |
9,944,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, assets [abstract] | ||||||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of liabilities [abstract] | ||||||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [line items] | ||||||||||||||||||||||||
| Liabilities | — | — | — | — | — |
5,121,000,000
USD
|
— | — |
4,537,000,000
USD
|
— | — | — | — |
4,110,000,000
USD
|
— | — | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, liabilities [abstract] | ||||||||||||||||||||||||
| Disclosure of fair value measurement of equity [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of equity [abstract] | ||||||||||||||||||||||||
| Disclosure of fair value measurement of equity [line items] | ||||||||||||||||||||||||
| Equity |
11,641,000,000
USD
|
11,000,000
USD
|
8,000,000
USD
|
221,000,000
USD
|
7,140,000,000
USD
|
4,741,000,000
USD
|
17,000,000
USD
|
9,000,000
USD
|
5,947,000,000
USD
|
11,840,000,000
USD
|
6,140,000,000
USD
|
221,000,000
USD
|
15,000,000
USD
|
5,834,000,000
USD
|
6,782,000,000
USD
|
10,000,000
USD
|
221,000,000
USD
|
12,370,000,000
USD
|
10,000,000
USD
|
5,631,000,000
USD
|
17,000,000
USD
|
221,000,000
USD
|
6,646,000,000
USD
|
12,029,000,000
USD
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |