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BORROWINGS - Supplemental Cash Flows (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)
Corporate borrowings
Disclosure of reconciliation of liabilities arising from financing activities [abstract]
Beginning Balance	$ 1,002
Cash Flows	1,020
Acquisition	0
Foreign Exchange Movement	79
Fair Value Changes	0
Ending Balance	2,101
Non-recourse borrowings
Disclosure of reconciliation of liabilities arising from financing activities [abstract]
Beginning Balance	7,324
Cash Flows	360
Acquisition	0
Foreign Exchange Movement	379
Fair Value Changes	0
Ending Balance	$ 8,063

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- References

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The increase (decrease) in liabilities arising from financing activities resulting from changes in fair values. [Refer: Liabilities arising from financing activities]

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The increase (decrease) in liabilities arising from financing activities resulting from the effect of changes in foreign exchange rates. [Refer: Liabilities arising from financing activities]

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The increase (decrease) in liabilities arising from financing activities resulting from financing cash flows. [Refer: Cash flows from (used in) financing activities; Liabilities arising from financing activities]

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The increase (decrease) in liabilities arising from financing activities resulting from obtaining or losing control of subsidiaries or other businesses. [Refer: Liabilities arising from financing activities; Subsidiaries [member]]

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The amount of liabilities for which cash flows were, or future cash flows will be, classified in the statement of cash flows as cash flows from financing activities. [Refer: Cash flows from (used in) financing activities; Liabilities]

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