Stock-Based Compensation - Schedule of Remaining Stock-based Compensation Expense (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2016	$ 1.2
2017	0.6
2018	0.4
2019	0.1
2020	0.0
Restricted Stock Units and Performance-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2016	13.1
2017	7.2
2018	3.1
2019	0.6
2020	$ 0.9