v3.3.1.900
Significant Accounting Policies - Additional Information (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
Segment
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Significant Accounting Policies [Line Items]      
Adjustment to Appropriated Retained Earnings $ 19    
Assets fair value 647 $ 692  
Retrocession arrangements amount 870 891 $ 785
Deferred carried interest in other liabilities $ 143 105  
Carrying value of deferred mutual fund commissions amortization, minimum 1 year    
Carrying value of deferred mutual fund commissions amortization, maximum 6 years    
Number of business segments | Segment 1    
Reduction of management fees $ 137    
Percentage of Yield Support waivers offset 50.00%    
Fair value of loaned securities $ 28,800 30,600  
Fair value of collateral held for loan securities $ 31,336 33,654  
Minimum [Member]      
Significant Accounting Policies [Line Items]      
Collateral cash and securities received in exchange of value of securities lent in order to reduce counterparty risk 102.00%    
Maximum [Member]      
Significant Accounting Policies [Line Items]      
Collateral cash and securities received in exchange of value of securities lent in order to reduce counterparty risk 112.00%    
Maximum [Member] | Software [Member]      
Significant Accounting Policies [Line Items]      
Estimated useful life 3 years    
Investments Measured At NAV [Member]      
Significant Accounting Policies [Line Items]      
Assets fair value $ 647 $ 692  
CLO Bank Loans [Member]      
Significant Accounting Policies [Line Items]      
Assets 3,600    
Liabilities $ 3,600