RESTATEMENT OF PREVIOUSLY ISSUED CONSOLIDATED FINANCIAL STATEMENTS - Consolidated Statement of Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ 369	$ 518	$ 1,024	$ 1,241
Other comprehensive (loss) income, net of tax:
Currency translation adjustments	(177)	(9)	(272)	(314)
Pension and other postretirement benefit plans	17	9	37	94
Hedging activities	(42)	2	(69)	8
Net other comprehensive income (loss)	(202)	2	(304)	(212)
Comprehensive income	173	520	726	1,029
Net income	$ 375	518	$ 1,030	1,241
As previously reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		544		1,276
Other comprehensive (loss) income, net of tax:
Currency translation adjustments		(50)		(332)
Pension and other postretirement benefit plans		8		89
Hedging activities		2		8
Net other comprehensive income (loss)		(40)		(235)
Comprehensive income		504		1,041
Net income		544		1,276
Restatement impacts
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		(26)		(35)
Other comprehensive (loss) income, net of tax:
Currency translation adjustments		41		18
Pension and other postretirement benefit plans		1		5
Hedging activities		0		0
Net other comprehensive income (loss)		42		23
Comprehensive income		16		(12)
Net income		(26)		(35)
Restatement impacts | Foreign Exchange Rate Used To Translate
Other comprehensive (loss) income, net of tax:
Currency translation adjustments		8		(14)
Restatement impacts | Offsetting Balance Sheet Impact Adjustments
Other comprehensive (loss) income, net of tax:
Currency translation adjustments		$ 49		$ 32