Income Taxes - Temporary Differences resulting in Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Investments	$ 5	$ 0
State net operating losses	420	426
Federal net operating loss	485	553
Foreign net operating loss	16	17
Compensation programs	81	97
Allowance for doubtful accounts	41	50
Self-insurance reserves	10	10
Accrued expenses	45	43
Federal tax credits	70	58
Financing obligations	2,445	2,319
Golf course properties’ obligation	35	30
Other debt-related items	0	78
Deferred revenue	42	46
Leases	66	36
Other	0	14
Subtotal	3,761	3,777
Less: valuation allowance	1,302	1,513
Total deferred tax assets	2,459	2,264
Depreciation and other property-related items	2,567	2,576
Other debt-related items	95	0
Intangibles	496	221
Prepaid expenses	20	24
Other	1	18
Total deferred tax liabilities	3,179	2,839
Net deferred tax liability	$ 720	$ 575