Financing Arrangements (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended	0 Months Ended		1 Months Ended
	Apr. 27, 2006	Dec. 31, 2014	May 15, 2003	Jun. 18, 2010	May 31, 2010	Dec. 31, 2013
Financing Arrangements
Long-term Debt, Total		$ 579.7				$ 307.7
Less Current Maturities		1.9				2.2
Long-term debt, net of current portion		577.8				305.5
Principal payments during each of the next five years and thereafter
2015		1.9
2016		226.3
2017		1.4
2018		0.1
2019		275.0
Thereafter		75.0
Letters of credit outstanding		23.6				23.6
5.85% Senior notes due 2016
Financing Arrangements
Interest rate (as a percent)	5.85%	5.85%
Long-term Debt, Total		225.0				225.0
Principal amount of notes issued	225.0
5.85% Senior notes due 2016 | Minimum
Financing Arrangements
Optional amount that the Company may prepay		1.0
5.47% notes due May 2013
Financing Arrangements
Interest rate (as a percent)			5.47%
Principal amount of notes issued			75.0
5.05% Senior notes due 2020
Financing Arrangements
Interest rate (as a percent)		5.05%		5.05%		5.05%
Long-term Debt, Total		75.0				75.0
Principal amount of notes issued				75.0
5.05% Senior notes due 2020 | Minimum
Financing Arrangements
Optional amount that the Company may prepay		1.0
Line of Credit matures on 2019
Financing Arrangements
Long-term Debt, Total		275.0
Other consists primarily of European borrowings (at interest rates ranging from 1.1% to 6.0%)
Financing Arrangements
Minimum interest rate (as a percent)		1.10%
Maximum interest rate (as a percent)		6.00%
Long-term Debt, Total		4.7				7.7
Senior unsecured notes
Financing Arrangements
Principal amount of notes issued			125.0
4.87% senior notes due 2010
Financing Arrangements
Interest rate (as a percent)			4.87%		4.87%
Principal amount of notes issued			50.0
Debt repaid					$ 50.0
Letters of credit
Financing Arrangements
Term of letters of credit from the date of issuance		1 year