Annual report pursuant to Section 13 and 15(d)

Debt and Other Obligations (Details) (Interest Expense Recognized)

v3.6.0.2
Debt and Other Obligations (Details) (Interest Expense Recognized) - 2.125% Convertible Senior Notes Due 2026
$ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]  
Contractual interest expense $ 5
Interest cost related to amortization of debt issuance costs 0
Interest cost related to amortization of the debt discount $ 6