INVESTMENT IN ASSOCIATES AND JOINT VENTURES - Balance Sheet Impact of Investments (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Disclosure Of Associates And Joint Ventures [Line Items]
Assets	$ 51,322	$ 56,308
Total liabilities	(32,579)	(34,131)
Associates and Joint Ventures
Disclosure Of Associates And Joint Ventures [Line Items]
Assets	41,245	45,480
Total liabilities	(24,418)	(25,537)
Total Net Assets	$ 16,827	$ 19,943

Expiry date 2020-01-01: The amount of resources: (a) controlled by the entity as a result of past events; and (b) from which future economic benefits are expected to flow to the entity. Effective 2020-01-01: The amount of a present economic resource controlled by the entity as a result of past events. Economic resource is a right that has the potential to produce economic benefits.

Expiry date 2020-01-01: The amount of present obligations of the entity arising from past events, the settlement of which is expected to result in an outflow from the entity of resources embodying economic benefits. Effective 2020-01-01: The amount of a present obligation of the entity to transfer an economic resource as a result of past events. Economic resource is a right that has the potential to produce economic benefits.

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