Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income Components Reclassification [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	$ 0.0	$ 213.6
Other Comprehensive Income (Loss), before Reclassifications, before Tax	12.0	(87.3)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	4.3	224.9
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(287.0)	(482.5)
Income tax (benefit) expense	(0.1)	(60.3)
Net current period other comprehensive (loss) income, net of income taxes	16.2	77.3
Other Comprehensive Income (loss), net of tax, prior to distribution of spinoff	16.2	77.3
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	(1.1)
Accumulated Other Comprehensive Income (Loss) Attributable to Spinoff	15.1
Ending Balance	(271.9)	(405.2)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		77.3
Foreign currency translation adjustment [Member]
Accumulated Other Comprehensive Income Components Reclassification [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	14.8	(27.8)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0.0	0.0
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(72.2)	(0.7)
Income tax (benefit) expense	0.0	0.0
Net current period other comprehensive (loss) income, net of income taxes	14.8	(27.8)
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	(1.1)
Accumulated Other Comprehensive Income (Loss) Attributable to Spinoff	13.7
Ending Balance	(58.5)	(28.5)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		(27.8)
Pension and postretirement liability adjustment [Member]
Accumulated Other Comprehensive Income Components Reclassification [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	0.1	(60.1)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	5.1	225.5
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(215.1)	(481.0)
Income tax (benefit) expense	(1.5)	(60.3)
Net current period other comprehensive (loss) income, net of income taxes	3.7	105.1
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	0.0
Accumulated Other Comprehensive Income (Loss) Attributable to Spinoff	3.7
Ending Balance	(211.4)	(375.9)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		105.1
Defined Benefit Plan, Amortization of Gains (Losses)	(5.1)	(11.9)
Derivative financial instruments fair value adjustment [Member]
Accumulated Other Comprehensive Income Components Reclassification [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(2.9)	0.6
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(0.8)	(0.6)
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	0.3	(0.8)
Income tax (benefit) expense	1.4	0.0
Net current period other comprehensive (loss) income, net of income taxes	(2.3)	0.0
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	0.0
Accumulated Other Comprehensive Income (Loss) Attributable to Spinoff	(2.3)
Ending Balance	$ (2.0)	(0.8)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		$ 0.0