Pension Benefit Plans (Details) - Funded Plan - Pension Benefit Plans - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
U.S.
Components of net periodic pension cost
Service cost	$ 3	$ 3
Interest cost	10	12
Expected asset return	(21)	(21)
Amortization:
Amortization of actuarial loss	16	14
Net periodic pension cost	8	8
Non-U.S.
Components of net periodic pension cost
Service cost	3	3
Interest cost	5	7
Expected asset return	(11)	(12)
Amortization:
Amortization of actuarial loss	$ 3	3
Net periodic pension cost		$ 1