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BORROWINGS - Non-Recourse Borrowings (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Disclosure of detailed information about borrowings [line items]
Current Non-recourse Borrowings And Current Portion of Non-current Non-recourse Borrowings	$ 226	$ 364
Non-current Portion Of Non-current Non-recourse Borrowings	9,463	7,699
Non-recourse borrowings
Disclosure of detailed information about borrowings [line items]
Total	$ 9,689	$ 8,063

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- Definition

Current Non-recourse Borrowings And Current Portion Of Non-current Non-recourse Borrowings

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- Definition

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- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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