Condensed Consolidating Financial Information (Condensed Consolidating Statements of Cash Flows) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	$ 8.9	$ 5.6
Investing activities
Additions to property, plant and equipment	(15.6)	(13.1)
Payments for (proceeds from) interest in affiliates	0.0	0.0
Proceeds from the disposition of assets	0.1	3.8
Net cash used by investing activities	(15.5)	(9.3)
Financing activities
Intercompany financing	0.0	0.0
Net dividends	0.0	0.0
Proceeds from long-term borrowings	300.0	0.0
Repayments of long-term debt	(304.1)	0.0
Borrowings of notes payable, net	94.5	43.3
Payments for debt issuance costs	(1.7)	(0.3)
Repurchase of common stock	(40.0)	0.0
Payments related to tax withholding for share-based compensation	(5.7)	(1.8)
Proceeds from the exercise of stock options	0.3	0.0
Net cash provided by financing activities	43.3	41.2
Effect of foreign exchange rate changes on cash and cash equivalents	(3.0)	1.3
Net increase in cash and cash equivalents	33.7	38.8
Cash and cash equivalents:
Beginning of the period	53.2	53.5
End of the period	86.9	92.3
Parent
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	(36.1)	(38.8)
Investing activities
Additions to property, plant and equipment	0.0	(0.1)
Payments for (proceeds from) interest in affiliates	0.0	0.0
Proceeds from the disposition of assets	0.0	0.0
Net cash used by investing activities	0.0	(0.1)
Financing activities
Intercompany financing	(30.4)	(19.1)
Net dividends	16.6	13.1
Proceeds from long-term borrowings	300.0
Repayments of long-term debt	(304.1)
Borrowings of notes payable, net	95.0	42.5
Payments for debt issuance costs	(1.7)	(0.3)
Repurchase of common stock	(40.0)
Payments related to tax withholding for share-based compensation	(5.7)	(1.8)
Proceeds from the exercise of stock options	0.3
Net cash provided by financing activities	30.0	34.4
Effect of foreign exchange rate changes on cash and cash equivalents	0.0	0.0
Net increase in cash and cash equivalents	(6.1)	(4.5)
Cash and cash equivalents:
Beginning of the period	9.7	7.0
End of the period	3.6	2.5
Guarantors
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	3.9	(14.2)
Investing activities
Additions to property, plant and equipment	(8.0)	(2.7)
Payments for (proceeds from) interest in affiliates	14.0	10.3
Proceeds from the disposition of assets	0.0	3.6
Net cash used by investing activities	6.0	11.2
Financing activities
Intercompany financing	4.0	9.4
Net dividends	(14.0)	(7.2)
Proceeds from long-term borrowings	0.0
Repayments of long-term debt	0.0
Borrowings of notes payable, net	0.0	0.0
Payments for debt issuance costs	0.0	0.0
Repurchase of common stock	0.0
Payments related to tax withholding for share-based compensation	0.0	0.0
Proceeds from the exercise of stock options	0.0
Net cash provided by financing activities	(10.0)	2.2
Effect of foreign exchange rate changes on cash and cash equivalents	0.0	0.0
Net increase in cash and cash equivalents	(0.1)	(0.8)
Cash and cash equivalents:
Beginning of the period	0.1	1.0
End of the period	0.0	0.2
Non-Guarantors
Condensed Financial Statements, Captions [Line Items]
Net cash provided by operating activities	41.1	58.6
Investing activities
Additions to property, plant and equipment	(7.6)	(10.3)
Payments for (proceeds from) interest in affiliates	(14.0)	(10.3)
Proceeds from the disposition of assets	0.1	0.2
Net cash used by investing activities	(21.5)	(20.4)
Financing activities
Intercompany financing	26.4	9.7
Net dividends	(2.6)	(5.9)
Proceeds from long-term borrowings	0.0
Repayments of long-term debt	0.0
Borrowings of notes payable, net	(0.5)	0.8
Payments for debt issuance costs	0.0	0.0
Repurchase of common stock	0.0
Payments related to tax withholding for share-based compensation	0.0	0.0
Proceeds from the exercise of stock options	0.0
Net cash provided by financing activities	23.3	4.6
Effect of foreign exchange rate changes on cash and cash equivalents	(3.0)	1.3
Net increase in cash and cash equivalents	39.9	44.1
Cash and cash equivalents:
Beginning of the period	43.4	45.5
End of the period	$ 83.3	$ 89.6