Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Reserves and other accrued expenses	$ 78	$ 37
Net operating loss carry forwards	296	436
Tax credit carry forwards	40	29
Interest limitation carryforwards	157	106
Differences in financial reporting and tax basis for:
Other	51	64
Valuation allowance	(209)	(245)
Realizable deferred tax assets	413	427
Deferred tax liabilities:
Deferred costs and prepaid expenses	(12)	(45)
Differences in financial reporting and tax basis for:
Identifiable intangible assets	(312)	(383)
Property and equipment	(47)	(62)
Other	(13)	(15)
Total deferred tax liabilities	(384)	(505)
Deferred Tax Assets, Net	$ 29
Net deferred tax liability on balance sheet		$ (78)