Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Unrecognized Tax Benefits (Details)

v3.7.0.1
Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Unrecognized tax benefits, beginning balance $ 81.9 $ 76.1 $ 70.1
Gross change for current year positions 1.3 5.7 5.3
Increases (decreases) for prior period positions (78.2) 0.1 0.7
Unrecognized tax benefits, ending balance $ 5.0 $ 81.9 $ 76.1