Lines of Credit and Financing Arrangements (Outstanding Debt Obligations) (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021	Nov. 01, 2016
Current maturities of long-term debt:
Total current maturities of long-term debt	$ 11,800,000	$ 11,300,000
Long-Term Debt:
Asset Securitization Program	279,000,000.0	250,000,000.0
Finance lease obligations	31,400,000	29,000,000.0
Debt issuance costs	(8,400,000)	(9,000,000.0)
Total long-term debt	1,599,500,000	1,226,500,000
Total debt	1,611,300,000	1,237,800,000
Domestic Credit Facility
Long-Term Debt:
Domestic credit facility and senior unsecured notes	347,500,000	6,500,000
Senior Unsecured Notes
Long-Term Debt:
Domestic credit facility and senior unsecured notes	950,000,000.0	950,000,000.0
Debt instrument, interest rate, stated percentage			3.00%
Foreign Obligations [Member]
Long-Term Debt:
Short-term Debt	$ 0	$ 0