Other Comprehensive (Loss) Income - Schedule of Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2015	$ (345.7)
Other Comprehensive (Loss) Income before Reclassifications	1.7
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	4.9
Total Other Comprehensive Income (Loss), Net of Tax	6.6	$ (16.4)
Balance at March 31, 2016	(339.1)
Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2015	(18.4)
Other Comprehensive (Loss) Income before Reclassifications	(4.3)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	2.3
Total Other Comprehensive Income (Loss), Net of Tax	(2.0)
Balance at March 31, 2016	(20.4)
Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2015	(87.8)
Other Comprehensive (Loss) Income before Reclassifications	6.0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	0.0
Total Other Comprehensive Income (Loss), Net of Tax	6.0
Balance at March 31, 2016	(81.8)
Pension and Postretirement Benefit Plans | Pension Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2015	(255.4)
Other Comprehensive (Loss) Income before Reclassifications	0.0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	3.0
Total Other Comprehensive Income (Loss), Net of Tax	3.0
Balance at March 31, 2016	(252.4)
Pension and Postretirement Benefit Plans | Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at December 31, 2015	15.9
Other Comprehensive (Loss) Income before Reclassifications	0.0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(0.4)
Total Other Comprehensive Income (Loss), Net of Tax	(0.4)
Balance at March 31, 2016	$ 15.5