Pension Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
U.S.
Components of net periodic pension cost
Service cost	$ 3	$ 3
Interest cost	12	15
Expected asset return	(21)	(22)
Amortization:
Amortization of actuarial loss	14	10
Net periodic pension cost	8	6
Non-U.S.
Components of net periodic pension cost
Service cost	3	3
Interest cost	7	8
Expected asset return	(12)	(12)
Amortization:
Amortization of actuarial loss	3	3
Net periodic pension cost	$ 1	$ 2