v3.7.0.1
Debt (First Lien Term Loans) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Debt Instrument [Line Items]      
Long-term Debt $ 11,943   $ 12,046
Gain (Loss) on Extinguishment of Debt (24) $ 0  
2017 First Lien Term Loan [Member]      
Debt Instrument [Line Items]      
Long-term Debt [1] 393   537
Gain (Loss) on Extinguishment of Debt (3)    
New 2019 First Lien Term Loan [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount 400    
Long-term Debt 389   0
Debt Issuance Costs, Net $ 8    
Gain (Loss) on Extinguishment of Debt 0.25%    
Debt Instrument Unamortized Discount Percent 1.00%    
2023 First Lien Term Loan [Member]      
Debt Instrument [Line Items]      
Long-term Debt $ 1,070   1,071
2024 First Lien Term Loan [Member]      
Debt Instrument [Line Items]      
Long-term Debt 1,553   1,557
First Lien Term Loans [Member]      
Debt Instrument [Line Items]      
Long-term Debt 3,405   3,165
First Lien Notes 2023 [Member]      
Debt Instrument [Line Items]      
Long-term Debt [2] 0   $ 450
Gain (Loss) on Extinguishment of Debt $ (21)    
Federal Funds Effective Rate [Member] | New 2019 First Lien Term Loan [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 0.50%    
Eurodollar Rate For A One-Month Interest Period [Member] | New 2019 First Lien Term Loan [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 1.00%    
Prime Rate or The Eurodollar Rate For A One-Month Interest Period [Member] | New 2019 First Lien Term Loan [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 0.75%    
London Interbank Offered Rate (LIBOR) [Member] | New 2019 First Lien Term Loan [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 1.75%    
Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member] | New 2019 First Lien Term Loan [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage 0.00%    
Early Redemption Amount [Member] | 2017 First Lien Term Loan [Member]      
Debt Instrument [Line Items]      
Long-term Debt, Gross $ 150    
Early Redemption Amount [Member] | First Lien Notes 2023 [Member]      
Debt Instrument [Line Items]      
Long-term Debt, Gross $ 453    
[1] On March 16, 2017, we used cash on hand to repay $150 million of our outstanding 2017 First Lien Term Loan. During the first quarter of 2017, we recorded approximately $3 million in debt extinguishment costs related to the partial repayment of our 2017 First Lien Term Loan.
[2] On March 6, 2017, we used cash on hand along with the proceeds from our 2019 First Lien Term Loan to redeem the remaining $453 million of our 2023 First Lien Notes, plus accrued and unpaid interest. During the first quarter of 2017, we recorded approximately $21 million in debt extinguishment costs related to the redemption of our 2023 First Lien Notes.