DERIVATIVE FINANCIAL INSTRUMENTS - Hedge Classification (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about hedging instruments [line items]
Notional Amount (U.S. Dollars)	$ 14,743	$ 15,855
Elected for hedge accounting
Disclosure of detailed information about hedging instruments [line items]
Notional Amount (U.S. Dollars)	12,037	14,153
Effective Portion	(128)	(146)
Ineffective Portion	11	15
Cash flow hedges \| Elected for hedge accounting
Disclosure of detailed information about hedging instruments [line items]
Notional Amount (U.S. Dollars)	11,089	10,943
Effective Portion	(160)	(33)
Ineffective Portion	9	(1)
Net investment hedges \| Elected for hedge accounting
Disclosure of detailed information about hedging instruments [line items]
Notional Amount (U.S. Dollars)	948	3,210
Effective Portion	32	(113)
Ineffective Portion	$ 2	$ 16

Gains (losses) on hedging instrument, effective portion

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The gain (loss) on hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph 24C
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- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
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