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FAIR VALUE OF FINANCIAL INSTRUMENTS - Carrying and Fair Value of Financial Instruments (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of financial assets [line items] |  |
Financial assets, carrying value | $ 5,400 | $ 4,305
Financial assets, fair value | 5,400 | 4,305
Disclosure of financial liabilities [line items] |  |
Financial liabilities, carrying value | 35,905 | 29,317
Financial liabilities, fair value | 36,226 | 29,817
Preferred shares | 20 | 20
Corporate borrowings |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities, carrying value | 2,719 | 3,158
Financial liabilities, fair value | 2,805 | 3,350
Non-recourse borrowings |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities, carrying value | 26,534 | 20,020
Financial liabilities, fair value | 26,769 | 20,328
Accounts payable and other |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities, carrying value | 3,392 | 2,745
Financial liabilities, fair value | 3,392 | 2,745
Preferred shares |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities, carrying value | 20 | 20
Financial liabilities, fair value | 20 | 20
Financial Liabilities |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities, carrying value | 3,240 | 3,374
Financial liabilities, fair value | 3,240 | 3,374
Cash and cash equivalents |  |
Disclosure of financial assets [line items] |  |
Financial assets, carrying value | 1,406 | 867
Financial assets, fair value | 1,406 | 867
Accounts receivable and other |  |
Disclosure of financial assets [line items] |  |
Financial assets, carrying value | 2,718 | 2,031
Financial assets, fair value | 2,718 | 2,031
Financial assets (current and non-current) |  |
Disclosure of financial assets [line items] |  |
Financial assets, carrying value | 1,276 | 1,407
Financial assets, fair value | $ 1,276 | $ 1,407

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