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DERIVATIVE FINANCIAL INSTRUMENTS - Notional Amount of Derivative Instruments Fair Value Through Profit or Loss (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | $ 14,743 | $ 15,855
Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 2,706 | 1,702
Elected for hedge accounting |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 12,037 | 14,153
Less than 1 year | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 974 |
Less than 1 year | Elected for hedge accounting |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 867 |
1 to 5 years | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 1,732 |
1 to 5 years | Elected for hedge accounting |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 6,591 |
Thereafter | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 0 |
Thereafter | Elected for hedge accounting |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 4,579 |
Foreign exchange contracts |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 3,274 | 4,626
Foreign exchange contracts | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 1,723 | 1,416
Foreign exchange contracts | Elected for hedge accounting |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 1,551 | 3,210
Foreign exchange contracts | Less than 1 year | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 867 |
Foreign exchange contracts | Less than 1 year | Elected for hedge accounting |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 438 |
Foreign exchange contracts | 1 to 5 years | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 856 |
Foreign exchange contracts | 1 to 5 years | Elected for hedge accounting |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 510 |
Foreign exchange contracts | Thereafter | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 0 |
Foreign exchange contracts | Thereafter | Elected for hedge accounting |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 603 |
Interest rate swaps, cross currency interest rate swaps and other |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 11,265 | 10,996
Interest rate swaps, cross currency interest rate swaps and other | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 779 | 53
Interest rate swaps, cross currency interest rate swaps and other | Elected for hedge accounting |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 10,486 | 10,943
Interest rate swaps, cross currency interest rate swaps and other | Less than 1 year | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 75 |
Interest rate swaps, cross currency interest rate swaps and other | Less than 1 year | Elected for hedge accounting |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 429 |
Interest rate swaps, cross currency interest rate swaps and other | 1 to 5 years | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 704 |
Interest rate swaps, cross currency interest rate swaps and other | 1 to 5 years | Elected for hedge accounting |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 6,081 |
Interest rate swaps, cross currency interest rate swaps and other | Thereafter | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 0 |
Interest rate swaps, cross currency interest rate swaps and other | Thereafter | Elected for hedge accounting |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 3,976 |
Inflation linked swaps | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 172 | 167
Inflation linked swaps | Less than 1 year | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 0 |
Inflation linked swaps | 1 to 5 years | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 172 |
Inflation linked swaps | Thereafter | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 0 |
Commodity contracts |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 32 | 66
Commodity contracts | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 32 | $ 66
Commodity contracts | Less than 1 year | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 32 |
Commodity contracts | 1 to 5 years | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | 0 |
Commodity contracts | Thereafter | Fair value through profit or loss |  |
Disclosure of detailed information about hedging instruments [line items] |  |
Notional Amount (U.S. Dollars) | $ 0 |

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