Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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ACQUISITIONS AND DIVESTITURES - Transaction, Reorganization, and Separation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Transaction, reorganization, and separation	$ 28	$ 16	$ 39
Consulting Fees
Business Acquisition [Line Items]
Transaction, reorganization, and separation	22
Employee Separation, Consolidation Of Office Space and Other Reorganization Efforts
Business Acquisition [Line Items]
Transaction, reorganization, and separation	$ 6