v3.6.0.2
Significant Transactions (Allocation of Purchase Price) (Details) - USD ($)
$ in Millions
Nov. 13, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Business Acquisition [Line Items]        
Goodwill   $ 35,980 $ 32,945 $ 27,316
NBCUniversal Media LLC [Member]        
Business Acquisition [Line Items]        
Goodwill   $ 23,323 $ 20,364 $ 14,908
Universal Studios Japan [Member]        
Business Acquisition [Line Items]        
Property and equipment (see Note 8) $ 780      
Intangible assets (see Note 9) 323      
Working capital (33)      
Debt (see Note 10) (3,271)      
Other noncurrent assets and liabilities and other 17      
Identifiable net assets (liabilities) acquired (2,184)      
Noncontrolling interest (1,440)      
Goodwill 5,123      
Cash consideration transferred 1,499      
Universal Studios Japan [Member] | NBCUniversal Media LLC [Member]        
Business Acquisition [Line Items]        
Property and equipment (see Note 8) 780      
Intangible assets (see Note 9) 323      
Working capital (33)      
Debt (see Note 10) (3,271)      
Other noncurrent assets and liabilities and other 17      
Identifiable net assets (liabilities) acquired (2,184)      
Noncontrolling interest (1,440)      
Goodwill 5,123      
Cash consideration transferred $ 1,499