Pension, Savings and Other Postretirement Benefit Plans - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Postretirement benefits expense (credit)	$ (3)	$ 2
Defined contribution plans, contribution expenses	30	$ 28
Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Contributions to pension plans	7
Non-U.S. | Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to funded pension plans in current year	25
Non-U.S. | Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to funded pension plans in current year	50
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Curtailment charge (credit)	(4)
Other Postretirement Benefits | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Curtailment charge (credit)	(4)
Settlement charges	$ 2