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FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENT (TABLE 3) (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	$ 926	$ 871
Financial liabilities	5,522	5,745
Recurring fair value measurement
Disclosure of fair value measurement of assets [line items]
Financial assets	926	871
Financial liabilities	7,314	7,063
Borrowings1 [Member] | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial liabilities	5,168	5,536
Borrowings1 [Member] | Recurring fair value measurement
Disclosure of fair value measurement of assets [line items]
Financial liabilities	6,960	6,854
Derivatives | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial liabilities	2	0
Derivatives | Recurring fair value measurement
Disclosure of fair value measurement of assets [line items]
Financial liabilities	2	0
Other liabilities | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial liabilities	352	209
Other liabilities | Recurring fair value measurement
Disclosure of fair value measurement of assets [line items]
Financial liabilities	352	209
Other assets | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	639	612
Other assets | Recurring fair value measurement
Disclosure of fair value measurement of assets [line items]
Financial assets	639	612
Other investments [Member] | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	250	258
Other investments [Member] | Recurring fair value measurement
Disclosure of fair value measurement of assets [line items]
Financial assets	250	258
Derivatives | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	37	1
Derivatives | Recurring fair value measurement
Disclosure of fair value measurement of assets [line items]
Financial assets	$ 37	$ 1

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The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities]

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