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DERIVATIVE FINANCIAL INSTRUMENTS - Hedge Classification (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about hedging instruments [line items]
Notional Amount (U.S. Dollars)	$ 15,855	$ 9,966
Elected for hedge accounting
Disclosure of detailed information about hedging instruments [line items]
Effective Portion	(146)	88
Ineffective Portion	15	8
Notional Amount (U.S. Dollars)	14,153	7,738
Cash flow hedges | Elected for hedge accounting
Disclosure of detailed information about hedging instruments [line items]
Effective Portion	(33)	(101)
Ineffective Portion	(1)	(1)
Notional Amount (U.S. Dollars)	10,943	6,024
Net investment hedges | Elected for hedge accounting
Disclosure of detailed information about hedging instruments [line items]
Effective Portion	(113)	189
Ineffective Portion	16	9
Notional Amount (U.S. Dollars)	$ 3,210	$ 1,714

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- Definition

Gains (losses) on hedging instrument, effective portion

+ References

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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.

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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 2019-01-01
-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
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-IssueDate 2019-01-01
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