Pension Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
U.S.
Components of net periodic pension cost
Service cost	$ 3	$ 3	$ 6	$ 6
Interest cost	13	15	25	30
Expected asset return	(20)	(22)	(41)	(44)
Amortization:
Amortization of actuarial loss	14	10	28	20
Net periodic pension cost	10	6	18	12
Non-U.S.
Components of net periodic pension cost
Service cost	4	3	7	6
Interest cost	6	7	13	15
Expected asset return	(12)	(11)	(24)	(22)
Amortization:
Amortization of actuarial loss	3	3	6	5
Net periodic pension cost	1	$ 2	2	$ 4
Pension Benefit Plans | Non-U.S.
Amortization:
Settlements	$ 8		$ 8