Retirement Plans - Schedule of Fair Value of Plan Assets (Details) - Pension Plans, Defined Benefit - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Assets	$ 37	$ 54	$ 60
Level 2
Defined Benefit Plan Disclosure [Line Items]
Assets	37	54
U.S. Equity Large Cap | Level 2
Defined Benefit Plan Disclosure [Line Items]
Assets	10	7
U.S. Equity Non-U.S. Equity | Level 2
Defined Benefit Plan Disclosure [Line Items]
Assets	16	13
Non-U.S. Bonds Corporate | Level 2
Defined Benefit Plan Disclosure [Line Items]
Assets	5	3
Non-U.S. Bonds Aggregate | Level 2
Defined Benefit Plan Disclosure [Line Items]
Assets	3	4
Non-U.S. Bonds Insurance Contracts | Level 2
Defined Benefit Plan Disclosure [Line Items]
Assets	0	24
Other Investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Assets	$ 3	$ 4