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Consolidated VREs Recorded in Condensed Consolidated Statements of Financial Condition (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Consolidated Sponsored Investment Funds [Line Items]        
Cash and cash equivalents $ 6,083 $ 5,723 $ 4,390 $ 4,606
Trading investments 785 536    
Other investments 641 1,105    
Other assets 855 685    
Other liabilities (1,033) (886)    
Noncontrolling interests (77) (119)    
Consolidated Voting Rights Entities [Member]        
Consolidated Sponsored Investment Funds [Line Items]        
Cash and cash equivalents 100 120    
Trading investments 700 443    
Other investments   270    
Other assets 18 20    
Other liabilities (77) (18)    
Noncontrolling interests (125) (139)    
BlackRock’s net interests in consolidated VREs $ 616 $ 696