Pension and Other Postretirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 1	$ 1	$ 2	$ 2
Recognized prior service credit	(7)	(8)	(13)	(17)
Recognized net loss	1	1	2	2
Net periodic cost (benefit)	(5)	(6)	(9)	(13)
U.S. | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	3	10	8
Interest cost	9	13	19	26
Expected return on plan assets	(19)	(17)	(37)	(35)
Recognized net loss	14	14	28	28
Net periodic cost (benefit)	9	13	20	27
Pension Benefits - Non-U.S. Plans | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	4	6	8
Interest cost	13	20	27	39
Expected return on plan assets	(22)	(34)	(53)	(69)
Pension settlements and curtailments	0	0	0	(14)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement	19	31	56	31
Recognized prior service credit		(1)		(1)
Recognized net loss	4	9	13	19
Net periodic cost (benefit)	$ 17	$ 29	$ 49	$ 13