Accumulated Other Comprehensive Income (Loss) - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax benefit	$ (20.4)	$ (22.0)	$ (8.9)
Total reclassifications from accumulated other comprehensive income (loss)	(2.3)	(2.4)	(0.8)
Unrealized pension and post-retirement obligations [Member] | Reclassifications from accumulated other comprehensive income (loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Adjustment of pension and post-retirement obligations	1.2	0.0	(0.1)
Tax benefit	0.0	0.0	0.0
Total reclassifications from accumulated other comprehensive income (loss)	1.2	0.0	(0.1)
Derivative financial instruments [Member] | Reclassifications from accumulated other comprehensive income (loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss on derivative financial instruments	(3.6)	(3.0)	(1.0)
Tax benefit	0.1	0.6	0.3
Total reclassifications from accumulated other comprehensive income (loss)	$ (3.5)	$ (2.4)	$ (0.7)