v3.2.0.727
Debt Credit Agreement (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
May. 17, 2011
Jun. 30, 2015
Jun. 30, 2014
Mar. 31, 2013
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Dec. 31, 2012
Mar. 31, 2011
Line of Credit Facility [Line Items]                  
Loss on extinguishment of debt   $ 0 $ 0   $ (52) $ (34)      
Amended and Restated Credit Agreement [Member]                  
Line of Credit Facility [Line Items]                  
Payments of Debt Issuance Costs       $ 14          
Loss on extinguishment of debt           $ (1)      
Unamortized Debt Issuance Costs   16     16        
Tranche A, Due 2018 | Loans Payable                  
Line of Credit Facility [Line Items]                  
Borrowings as of June 30, 2015   $ 400     $ 400   $ 400    
Tranche A, Due 2018 | JPMorgan Chase Bank, N.A.                  
Line of Credit Facility [Line Items]                  
Line of Credit Facility, Increase, Additional Borrowings               $ 574  
Tranche A, Due 2018 | Revolving Credit Facility | Minimum                  
Line of Credit Facility [Line Items]                  
Contingent change in Appplicable Rate   0.00%     0.00%        
Tranche A, Due 2018 | Revolving Credit Facility | Maximum                  
Line of Credit Facility [Line Items]                  
Contingent change in Appplicable Rate   2.25%     2.25%        
Tranche A, Due 2018 | Loans Payable | JPMorgan Chase Bank, N.A.                  
Line of Credit Facility [Line Items]                  
Credit Agreement on Senior Secured Facilities   $ 575     $ 575        
Rates effective as of June 30, 2015   1.1875%     1.1875%        
Tranche A, Due 2018 | Loans Payable | JPMorgan Chase Bank, N.A. | Administrative Agent’s Alternate Base Rate                  
Line of Credit Facility [Line Items]                  
Basis spread of variable rate         0.25%   0.25%    
Tranche A, Due 2018 | Loans Payable | JPMorgan Chase Bank, N.A. | LIBOR                  
Line of Credit Facility [Line Items]                  
Basis spread of variable rate         1.00%   1.00%    
Revolver, Due 2018 | JPMorgan Chase Bank, N.A.                  
Line of Credit Facility [Line Items]                  
Line of Credit Facility, Increase, Additional Borrowings $ 2,400             $ 1,300  
Revolver, Due 2018 | Revolving Credit Facility | JPMorgan Chase Bank, N.A.                  
Line of Credit Facility [Line Items]                  
Credit Agreement on Senior Secured Facilities   $ 1,500     $ 1,500        
Borrowings as of June 30, 2015   $ 0     $ 0        
Rates effective as of June 30, 2015   0.00%     0.00%        
Revolver, Due 2018 | Revolving Credit Facility | JPMorgan Chase Bank, N.A. | LIBOR                  
Line of Credit Facility [Line Items]                  
Basis spread of variable rate         1.00%        
Revolver, Due 2018 | Loans Payable | JPMorgan Chase Bank, N.A. | Administrative Agent’s Alternate Base Rate                  
Line of Credit Facility [Line Items]                  
Basis spread of variable rate         0.25%   0.25%    
Revolver, Due 2018 | Loans Payable | JPMorgan Chase Bank, N.A. | LIBOR                  
Line of Credit Facility [Line Items]                  
Basis spread of variable rate         1.00%   1.00%    
Original Credit Agreement | Secured Debt | JPMorgan Chase Bank, N.A.                  
Line of Credit Facility [Line Items]                  
Credit Agreement on Senior Secured Facilities                 $ 3,000
Letters of Credit Issued   $ 8     $ 8        
Covenant Compliance, Maximum Ratio of Indebtedness to EBITDA   275.00%     275.00%