Financing Arrangements (Details Textual) - USD ($)	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Line of Credit Facility [Line Items]
Short-term Debt	$ 22,500,000	$ 62,000,000
Long-term Fixed-rate Debt, Carrying Value	507,300,000	519,200,000
Financing Arrangements (Textual) [Abstract]
Line of Credit Facility, Fair Value of Amount Outstanding	641,400,000	594,500,000
Accounts Receivable, less allowances (2015 - $17.2 million; 2014 - $13.7 million	452,800,000	454,600,000
Series A Medium Term Note [Member]
Financing Arrangements (Textual) [Abstract]
Line of Credit Facility, Fair Value of Amount Outstanding	$ 159,500,000	174,400,000
Debt Instrument, Maturity Date	May 01, 2028
Senior Unsecured Notes - 3.875% [Member]
Financing Arrangements (Textual) [Abstract]
Line of Credit Facility, Fair Value of Amount Outstanding	$ 345,600,000	344,800,000
Debt Instrument, Interest rate	3.875%
Debt Instrument, Maturity Date	Sep. 01, 2024
Senior Unsecured Notes - Variable Rate [Member]
Financing Arrangements (Textual) [Abstract]
Maximum borrowing capacity under line of credit	$ 500,000,000
Remaining Borrowing Capacity under Line of Credit Facility of Company's foreign subsidiaries	$ 423,800,000
Line of credit expiration date	Jun. 19, 2020
Line of Credit Facility, Fair Value of Amount Outstanding	$ 76,200,000	$ 75,200,000
Debt Instrument, Interest rate	1.53%	1.45%
Debt Instrument, Maturity Date	Jun. 20, 2020
Foreign Subsidiary [Member]
Financing Arrangements (Textual) [Abstract]
Borrowings guarantees	$ 3,800,000
Line of Credit Accounts Receivable Securitization [Member]
Line of Credit Facility [Line Items]
Short-term Debt	72,500,000
Financing Arrangements (Textual) [Abstract]
Maximum borrowing capacity under line of credit	100,000,000
Remaining Borrowing Capacity under Line of Credit Facility of Company's foreign subsidiaries	$ 3,600,000
Line of credit expiration date	Nov. 30, 2018
Line of Credit Facility, Fair Value of Amount Outstanding	$ 68,900,000
Line of Credit [Member] | Foreign Subsidiary [Member]
Line of Credit Facility [Line Items]
Short-term Debt	11,500,000	$ 13,000,000
Financing Arrangements (Textual) [Abstract]
Maximum borrowing capacity under line of credit	230,300,000
Remaining Borrowing Capacity under Line of Credit Facility of Company's foreign subsidiaries	$ 215,000,000
Line of Credit Accounts Receivable Securitization [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate at Period End	1.41%	1.05%
Financing Arrangements (Textual) [Abstract]
Line of credit stated variable interest rate, Low Range	1.41%
Variable Rate Lines of Credit [Member]
Financing Arrangements (Textual) [Abstract]
Line of credit stated variable interest rate, Low Range	0.28%	0.31%
Line of Credit stated variable interest rate, High Range	0.50%	0.44%