Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Schedule of Restricted Cash and Cash Equivalents [Table Text Block]

(In millions)	December 31, 2016		December 31, 2015
Cash and cash equivalents	$	1,513	$	1,227
Restricted cash, current portion	3,113		58
Restricted cash, non-current portion	5		109
Total cash, cash equivalents, and restricted cash	$	4,631	$	1,394

Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

Allowance for Doubtful Accounts
(In millions)	2016			2015			2014
Balance as of January 1	$	48		$	196		$	162
Provision for doubtful accounts	11			11			50
Write-offs less recoveries	(18		)	3			(16		)
CEOC deconsolidation	—			(162		)	—
Balance as of December 31	$	41		$	48		$	196

Property, Plant and Equipment, Estimated Useful Lives [Table Text Block]

Useful Lives
Land improvements			12	years
Buildings	20	to	40	years
Building and leasehold improvements	5	to	20	years
Furniture, fixtures, and equipment	2.5	to	20	years