Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Schedule of Long-Term Debt (Detail)

v3.6.0.2
Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Debt Disclosure [Abstract]    
Senior secured credit facility, carrying value $ 410.0 $ 639.5
Convertible senior notes, carrying value of liability component 1,024.8 982.5
Other 13.1  
Total 1,447.9 1,622.0
Less: current portion 9.5 229.5
Long-term portion $ 1,438.4 $ 1,392.5