Retirement Plans - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Amortization of actuarial loss	$ 1	$ 0	$ 0
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	5	5
Interest cost	1	2	1
Expected return on plan assets	(2)	(2)	(2)
Net periodic benefit cost	$ 4	$ 4	$ 5