Quarterly report pursuant to Section 13 or 15(d)

Debt (Senior Notes) (Details)

v3.5.0.2
Debt (Senior Notes) (Details) - USD ($)
$ in Millions
1 Months Ended
Jun. 30, 2016
Mar. 24, 2016
Feb. 29, 2016
Apr. 30, 2014
Health Net, Inc.        
Debt Instrument [Line Items]        
Long term debt   $ 418    
LIBOR plus 4.22%, Interest Rate Swap        
Debt Instrument [Line Items]        
Derivative, notional amount     $ 600  
Variable rate of swap, percentage     4.22%  
LIBOR plus 4.44%, Interest Rate Swap        
Debt Instrument [Line Items]        
Derivative, notional amount     $ 1,000  
Variable rate of swap, percentage     4.44%  
Senior Notes | Health Net, Inc.        
Debt Instrument [Line Items]        
Long term debt   $ 418    
Senior Notes | $1,400 million 5.625% Senior notes, due February 15, 2021        
Debt Instrument [Line Items]        
Debt, face amount $ 1,400   $ 1,400  
Interest rate, stated 5.625%   5.625%  
Senior Notes | $1,000 million 6.125% Senior notes, due February 15, 2024        
Debt Instrument [Line Items]        
Debt, face amount $ 1,000   $ 1,000  
Interest rate, stated 6.125%   6.125%  
Senior Notes | $400 million 6.375% Senior notes, due June 1, 2017        
Debt Instrument [Line Items]        
Debt, face amount $ 400      
Interest rate, stated 6.375%      
Senior Notes | $425 million 5.75% Senior notes, due June 1, 2017        
Debt Instrument [Line Items]        
Debt, face amount $ 425      
Interest rate, stated 5.75%      
Senior Notes | $1,000 million 4.75% Senior notes, due May 15, 2022        
Debt Instrument [Line Items]        
Debt, face amount $ 1,000     $ 500
Interest rate, stated 4.75%     4.75%
Effective yield on add-on notes 4.41%      
Add-on notes, face amount $ 500