Net Periodic Pension and Postretirement Benefit Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Non-US
Employer contributions
Employer contributions			$ 1
Pension Plan
Anticipated cash contributions
Anticipated cash contributions in current year	$ 4		4
Pension Plan | US
Components of Net Periodic Benefit Costs
Service cost	1	$ 1	2	$ 2
Interest cost	3	3	6	7
Expected return on plan assets	(6)	(4)	(11)	(9)
Net periodic benefit cost/(benefit)	(2)		(3)
Anticipated cash contributions
Anticipated cash contributions in current year	1		1
Pension Plan | Non-US
Components of Net Periodic Benefit Costs
Service cost	1	1	2	2
Interest cost	3	2	6	5
Expected return on plan assets	(2)	(2)	(4)	(4)
Amortization of actuarial loss	1	1	1	1
Net periodic benefit cost/(benefit)	3	$ 2	5	4
Anticipated cash contributions
Anticipated cash contributions in current year	3		3
Postemployment Retirement Benefits
Components of Net Periodic Benefit Costs
Interest cost	1		2	1
Amortization of prior service credit			(1)	$ (1)
Net periodic benefit cost/(benefit)	$ 1		$ 1