Stockholders' Equity Stockholders' Equity (Details 2) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2015	Sep. 30, 2014
Components of Accumlated Other Comprehensive Income (Loss) Net of Tax
Beginning balance	$ (181.7)	$ (196.0)	$ (130.5)	$ (5.9)	$ (3.8)	$ (6.9)	$ (130.5)	$ (6.9)
Other comprehensive loss before reclassifications	21.7	(9.6)	69.7	51.1	3.1	(2.5)
Amounts reclassified from accumulated other comprehensive income	4.3	4.7	4.2	1.5	1.0	0.6
Net current period other comprehensive income (loss)	(17.4)	14.3	(65.5)	(49.6)	(2.1)	3.1	(68.6)	(48.6)
Ending balance	(199.1)	(181.7)	(196.0)	(55.5)	(5.9)	(3.8)	(199.1)	(55.5)
Gains and Losses on Cash Flow Hedges
Components of Accumlated Other Comprehensive Income (Loss) Net of Tax
Beginning balance	(6.1)	(10.4)	(6.3)	(1.0)	(0.1)	1.0	(6.3)	1.0
Other comprehensive loss before reclassifications	3.2	(1.0)	6.9	2.9	1.1	0.9
Amounts reclassified from accumulated other comprehensive income	2.9	3.3	2.8	0.8	0.2	(0.2)
Net current period other comprehensive income (loss)	(0.3)	4.3	(4.1)	(2.1)	(0.9)	(1.1)
Ending balance	(6.4)	(6.1)	(10.4)	(3.1)	(1.0)	(0.1)	(6.4)	(3.1)
Pension & Postretirement
Components of Accumlated Other Comprehensive Income (Loss) Net of Tax
Beginning balance	(92.2)	(93.6)	(95.0)	(61.1)	(61.9)	(62.7)	(95.0)	(62.7)
Other comprehensive loss before reclassifications	0.0	0.0	0.0	0.0	0.0	0.0
Amounts reclassified from accumulated other comprehensive income	1.4	1.4	1.4	0.7	0.8	0.8
Net current period other comprehensive income (loss)	1.4	1.4	1.4	0.7	0.8	0.8
Ending balance	(90.8)	(92.2)	(93.6)	(60.4)	(61.1)	(61.9)	(90.8)	(60.4)
Accumulated Translation Adjustment [Member]
Components of Accumlated Other Comprehensive Income (Loss) Net of Tax
Beginning balance	(83.4)	(92.0)	(29.2)	56.2	58.2	54.8	(29.2)	54.8
Other comprehensive loss before reclassifications	18.5	(8.6)	62.8	48.2	2.0	(3.4)
Amounts reclassified from accumulated other comprehensive income	0.0	0.0	0.0	0.0	0.0	0.0
Net current period other comprehensive income (loss)	(18.5)	8.6	(62.8)	(48.2)	(2.0)	3.4
Ending balance	$ (101.9)	$ (83.4)	$ (92.0)	$ 8.0	$ 56.2	$ 58.2	$ (101.9)	$ 8.0