Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income Components Reclassification [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	$ (19.9)	$ 6.2	$ (52.0)	$ (14.5)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	13.6	32.1	53.6	98.8
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(397.8)	(985.4)	(626.1)	(1,013.2)
Income tax (benefit) expense	(4.9)	(10.0)	(18.2)	(32.5)
Net current period other comprehensive (loss) income, net of income taxes	(11.2)	28.3	(16.6)	51.8
Other Comprehensive Income (loss), net of tax, prior to distribution of spinoff	(11.2)		(16.6)
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	0.5	3.5	0.1	7.8
Accumulated Other Comprehensive Income (Loss) Attributable to Spinoff			234.1
Net current period comprehensive (loss) income, net of income taxes and non-controlling interest	(10.7)	31.8	217.6	59.6
Ending Balance	(408.5)	(953.6)	(408.5)	(953.6)
Foreign currency translation adjustment [Member]
Accumulated Other Comprehensive Income Components Reclassification [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(25.9)	15.2	(17.6)	(19.3)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0	0	0	0
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	48.5	18.8	37.5	49.0
Income tax (benefit) expense	0	0	0	0
Net current period other comprehensive (loss) income, net of income taxes	(25.9)	15.2	(17.6)	(19.3)
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	0.5	3.5	0.1	7.8
Accumulated Other Comprehensive Income (Loss) Attributable to Spinoff			3.1
Net current period comprehensive (loss) income, net of income taxes and non-controlling interest	(25.4)	18.7	(14.4)	(11.5)
Ending Balance	23.1	37.5	23.1	37.5
Pension and postretirement liability adjustment [Member]
Accumulated Other Comprehensive Income Components Reclassification [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	6.1	(7.3)	(33.4)	4.6
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	13.5	32.3	52.9	99.2
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(445.7)	(1,004.7)	(663.2)	(1,061.5)
Income tax (benefit) expense	(4.2)	(10.7)	(17.6)	(32.7)
Net current period other comprehensive (loss) income, net of income taxes	15.4	14.3	1.9	71.1
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	0		0	0
Accumulated Other Comprehensive Income (Loss) Attributable to Spinoff			231.0
Net current period comprehensive (loss) income, net of income taxes and non-controlling interest	15.4	14.3	232.9	71.1
Ending Balance	(430.3)	(990.4)	(430.3)	(990.4)
Derivative financial instruments fair value adjustment [Member]
Accumulated Other Comprehensive Income Components Reclassification [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(0.1)	(1.7)	(1.0)	0.2
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0.1	(0.2)	0.7	(0.4)
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(0.6)	0.5	(0.4)	(0.7)
Income tax (benefit) expense	(0.7)	0.7	(0.6)	0.2
Net current period other comprehensive (loss) income, net of income taxes	(0.7)	(1.2)	(0.9)	0
Other Comprehensive (Income) Loss, Net of Tax, Portion Attributable to Noncontrolling Interest	0		0	0
Accumulated Other Comprehensive Income (Loss) Attributable to Spinoff			0
Net current period comprehensive (loss) income, net of income taxes and non-controlling interest	(0.7)	(1.2)	(0.9)	0
Ending Balance	$ (1.3)	$ (0.7)	$ (1.3)	$ (0.7)