Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income Components Reclassification [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	$ 0.4	$ 3.9	$ 0.4	$ 217.5
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(12.8)	(0.4)	(0.8)	(87.7)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	5.7	12.5	10.0	237.4
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(271.9)	(405.2)	(287.0)	(482.5)
Income tax (benefit) expense	(2.3)	(3.4)	(2.4)	(63.7)
Net current period other comprehensive (loss) income, net of income taxes	(9.4)	8.7	6.8	86.0
Other Comprehensive Income (loss), net of tax, prior to distribution of spinoff	(9.4)	8.7	6.8	86.0
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	(0.2)	0.5	(1.3)	0.5
Accumulated Other Comprehensive Income (Loss) Attributable to Spinoff	(9.6)	9.2	5.5	86.5
Ending Balance	(281.5)	(396.0)	(281.5)	(396.0)
Foreign currency translation adjustment [Member]
Accumulated Other Comprehensive Income Components Reclassification [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(18.4)	6.6	(3.6)	(21.2)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0.0	0.0	0.0	0.0
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(58.5)	(28.5)	(72.2)	(0.7)
Income tax (benefit) expense	0.0	0.0	0.0	0.0
Net current period other comprehensive (loss) income, net of income taxes	(18.4)	6.6	(3.6)	(21.2)
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	(0.2)	0.5	(1.3)
Accumulated Other Comprehensive Income (Loss) Attributable to Spinoff	(18.6)	7.1	(4.9)	(20.7)
Ending Balance	(77.1)	(21.4)	(77.1)	(21.4)
Pension and postretirement liability adjustment [Member]
Accumulated Other Comprehensive Income Components Reclassification [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	4.7	(6.4)	4.8	(66.5)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	5.5	12.4	10.6	237.9
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(211.4)	(375.9)	(215.1)	(481.0)
Income tax (benefit) expense	(1.9)	(3.6)	(3.4)	(63.9)
Net current period other comprehensive (loss) income, net of income taxes	8.3	2.4	12.0	107.5
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	0.0	0.0	0.0
Accumulated Other Comprehensive Income (Loss) Attributable to Spinoff	8.3	2.4	12.0	107.5
Ending Balance	(203.1)	(373.5)	(203.1)	(373.5)
Defined Benefit Plan, Amortization of Gains (Losses)			(10.2)	(20.4)
Derivative financial instruments fair value adjustment [Member]
Accumulated Other Comprehensive Income Components Reclassification [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	0.9	(0.6)	(2.0)	0.0
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0.2	0.1	(0.6)	(0.5)
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(2.0)	(0.8)	0.3	(0.8)
Income tax (benefit) expense	(0.4)	0.2	1.0	0.2
Net current period other comprehensive (loss) income, net of income taxes	0.7	(0.3)	(1.6)	(0.3)
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	0.0	0.0	0.0
Accumulated Other Comprehensive Income (Loss) Attributable to Spinoff	0.7	(0.3)	(1.6)	(0.3)
Ending Balance	$ (1.3)	$ (1.1)	$ (1.3)	$ (1.1)