Financial Instruments - Additional Information (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Amended Revolving Credit Facility [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Standby and trade letters of credit for various corporate purposes	$ 9.8
2011 Revolving Credit Facility Due 2016 [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Standby and trade letters of credit for various corporate purposes		10.4
Standby Letters Of Credit Which Support Products Corporations Self Insurance Programs [Member] | Amended Revolving Credit Facility [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Standby and trade letters of credit for various corporate purposes	8.1
Standby Letters Of Credit Which Support Products Corporations Self Insurance Programs [Member] | 2011 Revolving Credit Facility Due 2016 [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Standby and trade letters of credit for various corporate purposes		8.7
Foreign Exchange Contract [Member]
Fair Value Measurements Of Financial Instruments [Line Items]
Derivative, Notional Amount	$ 46.2	$ 43.9