Long-Term Debt and Commitments (Details) In Millions, unless otherwise specified	12 Months Ended					6 Months Ended	12 Months Ended		12 Months Ended			12 Months Ended		12 Months Ended		12 Months Ended				12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2014 USD ($) Facility	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 Minimum [Member]	Dec. 31, 2014 Maximum [Member]	Dec. 31, 2014 Term Loan Facility, net of unamortized discount of $14.1 million due May 9, 2021 [Member] USD ($)	Dec. 31, 2014 Term Loan Facility, net of unamortized discount of $14.1 million due May 9, 2021 [Member] USD ($)	Dec. 31, 2013 Term Loan Facility, net of unamortized discount of $14.1 million due May 9, 2021 [Member] USD ($)	Dec. 31, 2014 Term Loan Facility, net of unamortized discount of $14.1 million due May 9, 2021 [Member] LIBOR [Member]	Dec. 31, 2014 Term Loan Facility, net of unamortized discount of $14.1 million due May 9, 2021 [Member] LIBOR [Member] Minimum [Member]	Dec. 31, 2014 Term Loan Facility, net of unamortized discount of $14.1 million due May 9, 2021 [Member] LIBOR [Member] Maximum [Member]	Dec. 31, 2014 3.46% Series A Senior Notes due October 7, 2020 [Member] USD ($)	Dec. 31, 2013 3.46% Series A Senior Notes due October 7, 2020 [Member] USD ($)	Dec. 31, 2014 4.13% Series B Senior Notes due October 7, 2023 [Member] USD ($)	Dec. 31, 2013 4.13% Series B Senior Notes due October 7, 2023 [Member] USD ($)	Dec. 31, 2014 China Loan Facility 1 [Member] USD ($)	Dec. 20, 2014 China Loan Facility 1 [Member] USD ($)	Dec. 20, 2014 China Loan Facility 1 [Member] CNY	Dec. 31, 2013 China Loan Facility 1 [Member] USD ($)	Dec. 31, 2014 Variable/Fixed Rate Industrial Development Revenue Bonds Series 1999 due November 1, 2014 [Member] USD ($)	Dec. 31, 2013 Variable/Fixed Rate Industrial Development Revenue Bonds Series 1999 due November 1, 2014 [Member] USD ($)	Dec. 31, 2014 Revolving Credit Facility [Member] USD ($)	Dec. 31, 2014 Letter of Credit [Member] USD ($)	Dec. 31, 2014 China Loan Facility 2 [Member] USD ($)	Dec. 31, 2014 China Loan Facility 2 [Member] CNY	Dec. 31, 2014 China Loan Facility 3 [Member]	Dec. 20, 2014 China Loan Facility 3 [Member] USD ($)	Dec. 20, 2014 China Loan Facility 3 [Member] CNY
Debt Instrument [Line Items]
Debt	$ 1,455.8	$ 83.2				$ 1,454.0	$ 1,454.0	$ 0				$ 0	$ 30.0	$ 0	$ 45.0	$ 1.8			$ 0	$ 0	$ 8.2
Less: Current maturities	0.3	8.2
Long-term debt	1,455.5	75.0
Long-term debt, unamortized discount						14.1	14.1
Interest rate on debt instrument (in hundredths)												3.46%		4.13%
Maturity date							May 09, 2021					Oct. 07, 2020		Oct. 07, 2023		May 09, 2019				Nov. 01, 2014				Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2018
Long term debt, variable rate basis									LIBOR
Long-term debt, gross						1,560.0	1,560.0										1.4					0		0.3			0
Maximum borrowing capacity	39.8																1.8	47.5				200.0			5.3			21.0
Repayments of long-term debt	175.0	77.3	8.6			91.8														8.2
Facility variable interest rate (in hundredths)										0.75%	3.25%											1.75%
Basis points related to debt																						0.25%
Discount interest rate on notes (in hundredths)	1.00%
Amortization rate on notes (in hundredths)	1.00%
Letters of credit outstanding																						9.4	15.0
Net leverage ratio				3.50	5.25
Deferred financing costs	28.7
Number of additional committed loan facilities	2
Uncommitted short-term bank credit lines, amount outstanding	5.6
Long-term debt maturities [Abstract]
2015	0.3
2016	0.4
2017	0.8
2018	0.2
2019	0
Thereafter	1,468.2
Short-term Borrowings [Abstract]
Short-term borrowings	5.6	5.5
Weighted average interest rate on short-term borrowings (in hundredths)	4.10%	4.80%
Interest costs [Abstract]
Interest costs	44.6	3.4	3.5
Capitalized interest cost	$ 0.6	$ 0.1	$ 0.3