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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2015
Accounting Policies [Abstract]  
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Allowance for Doubtful Accounts
(In millions)
2015
 
2014
 
2013
Balance as of January 1
$
196

 
$
162

 
$
202

Charged to income
11

 
50

 
29

Charge-offs less recoveries
3

 
(16
)
 
(69
)
CEOC deconsolidation
(162
)
 
—

 
—

Balance as of December 31
$
48

 
$
196

 
$
162