XML 69 R57.htm IDEA: XBRL DOCUMENT v3.4.0.3
Fair Value Measurements - Separate Account Assets Priced at NAV (Details) - Separate Account Assets [Member] - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Fair Value Investments, Entities That Calculate Net Asset Value Per Share [Line Items]    
Unfunded Commitments $ 274  
Fair Value, Measurements, Recurring [Member]    
Fair Value Investments, Entities That Calculate Net Asset Value Per Share [Line Items]    
Fair Value 930 $ 928
Security Partnerships [Member]    
Fair Value Investments, Entities That Calculate Net Asset Value Per Share [Line Items]    
Unfunded Commitments $ 274  
Redemption Frequency [1] Not applicable  
Security Partnerships [Member] | Fair Value, Measurements, Recurring [Member]    
Fair Value Investments, Entities That Calculate Net Asset Value Per Share [Line Items]    
Fair Value $ 432 $ 406
Real Estate Funds [Member]    
Fair Value Investments, Entities That Calculate Net Asset Value Per Share [Line Items]    
Unfunded Commitments $ 0  
Redemption Frequency [1] Quarterly  
Real Estate Funds [Member] | Minimum [Member]    
Fair Value Investments, Entities That Calculate Net Asset Value Per Share [Line Items]    
Redemption Notice Period 45 days 45 days
Real Estate Funds [Member] | Maximum [Member]    
Fair Value Investments, Entities That Calculate Net Asset Value Per Share [Line Items]    
Redemption Notice Period 90 days 90 days
Real Estate Funds [Member] | Fair Value, Measurements, Recurring [Member]    
Fair Value Investments, Entities That Calculate Net Asset Value Per Share [Line Items]    
Fair Value $ 266 $ 261
Hedge Funds [Member]    
Fair Value Investments, Entities That Calculate Net Asset Value Per Share [Line Items]    
Unfunded Commitments $ 0  
Redemption Frequency [1] Up to Annually, varying by fund  
Hedge Funds [Member] | Minimum [Member]    
Fair Value Investments, Entities That Calculate Net Asset Value Per Share [Line Items]    
Redemption Notice Period 30 days 30 days
Hedge Funds [Member] | Maximum [Member]    
Fair Value Investments, Entities That Calculate Net Asset Value Per Share [Line Items]    
Redemption Notice Period 90 days 90 days
Hedge Funds [Member] | Fair Value, Measurements, Recurring [Member]    
Fair Value Investments, Entities That Calculate Net Asset Value Per Share [Line Items]    
Fair Value $ 232 $ 261
[1] The attributes noted are effective as of March 31, 2016 and December 31, 2015.