Net Periodic Pension and Postretirement Benefit Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Non-US
Employer contributions
Employer contributions	$ 1
Pension Plan
Anticipated cash contributions
Anticipated cash contributions in current year	4
Pension Plan | US
Components of Net Periodic Benefit Costs
Service cost	1	$ 1
Interest cost	2	3
Expected return on plan assets	(5)	(5)
Net periodic benefit cost/(benefit)	(2)	(1)
Anticipated cash contributions
Anticipated cash contributions in current year	1
Pension Plan | Non-US
Components of Net Periodic Benefit Costs
Service cost	1	1
Interest cost	3	3
Expected return on plan assets	(2)	(2)
Amortization of actuarial loss	1
Net periodic benefit cost/(benefit)	3	2
Anticipated cash contributions
Anticipated cash contributions in current year	3
Postemployment Retirement Benefits
Components of Net Periodic Benefit Costs
Interest cost	1	1
Amortization of prior service credit	$ (1)	$ (1)