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SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) yr | Dec. 31, 2020 USD ($) yr
Disclosure of initial application of standards or interpretations [line items] |  |
Assets | $ | $ 391,003 | $ 343,696
Right-of-use assets | $ | $ 4,100 | $ 3,300
Renewable Power |  |
Disclosure of initial application of standards or interpretations [line items] |  |
Useful lives or depreciation rates, property, plant and equipment | 31 | 32
Top of range | Bridges, Roads and Equipment | Infrastructure |  |
Disclosure of initial application of standards or interpretations [line items] |  |
Useful lives or depreciation rates, property, plant and equipment | 25 |
Bottom of range | Bridges, Roads and Equipment | Infrastructure |  |
Disclosure of initial application of standards or interpretations [line items] |  |
Useful lives or depreciation rates, property, plant and equipment | 3 |

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