Retirement Plans - Schedule of Changes in Benefit Obligations and Plan Assets (Details) - Pension Plans, Defined Benefit - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Change in Benefit Obligation
Benefit obligation at beginning of year	$ 74	$ 66
Service cost	5	5	$ 4
Interest cost	2	1	1
Actuarial (gain) loss	(2)	1
Benefits paid	(2)	(1)
Curtailments	0	(3)
Settlement	(3)	0
Acquisition	0	1
Other	4	0
Translation difference	(2)	4
Benefit obligation at end of year	76	74	66
Change in Plan Assets
Fair value of plan assets at beginning of year	60	51
Actual return on plan assets	(2)	3
Company contributions	4	6
Benefits paid	(2)	(1)
Settlements	(3)	(3)
Acquisition	0	1
Other	(1)	0
Translation difference	(2)	3
Fair value of plan assets at year end	54	60	$ 51
Funded status recognized in the balance sheet	$ (22)	$ (14)