v3.8.0.1
Condensed Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]    
Net income $ 1,094 $ 868
Other comprehensive income:    
Foreign currency translation adjustments [1] 137 40
Other   (1)
Other comprehensive income (loss) 137 39
Comprehensive income 1,231 907
Less: Comprehensive income (loss) attributable to noncontrolling interests 5 9
Comprehensive income attributable to BlackRock, Inc. $ 1,226 $ 898
[1] Amounts for the three months ended March 31, 2018 and 2017 include a loss from a net investment hedge of $16 million (net of a tax benefit of $5 million) and $7 million (net of a tax benefit of $4 million), respectively.