Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deferred tax asset
Net operating loss and other tax attribute carryforwards	$ 154	$ 191
Accrued expenses	60	65
Pension and other retirement obligations	25	26
Other	62	64
Total deferred tax asset	301	346
Valuation allowance	(73)	(93)
Total deferred tax asset, net	228	253
Deferred tax liability
Intangible assets	(330)	(371)
Property and equipment	(299)	(255)
Other	(35)	(38)
Total deferred tax liability	(664)	(664)
Other long-term assets	8	8
Deferred tax liability	(444)	(419)
Net deferred tax liability	$ (436)	$ (411)