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SEGMENT INFORMATION - Operating Income to Income Before Income Taxes Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating income	$ 424	$ 331	$ 814	$ 740
Net interest expense	(34)	(36)	(68)	(57)
Other (income) expense, net	(2)	6	3	16
Income before income taxes	392	289	743	667
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating income	943	791	1,815	1,624
Corporate and Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating income	$ (519)	$ (460)	$ (1,001)	$ (884)

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