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Lines of Credit and Financing Arrangements (Outstanding Debt Obligations) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Current maturities of long-term debt: |  |
Finance lease obligations | $ 11.2 | $ 11.3
Senior unsecured notes | 710.6 | 11.3
Long-Term Debt: |  |
Asset securitization program | 0.0 | 250.0
Finance lease obligations | 28.3 | 29.0
Total long-term debt | 814.2 | 1,226.5
Debt Issuance Cost, Gross, Noncurrent | (6.1) | (9.0)
Total debt | 1,524.8 | 1,237.8
Domestic Credit Facility [Member] |  |
Current maturities of long-term debt: |  |
Debt issuance costs | (0.6) | 0.0
Senior unsecured notes | 350.0 | 0.0
Long-Term Debt: |  |
Total long-term debt | 192.0 | 6.5
Asset Securitization [Member] |  |
Current maturities of long-term debt: |  |
Asset securitization program | 350.0 | 0.0
Senior Unsecured Notes [Member] |  |
Long-Term Debt: |  |
Total long-term debt | $ 600.0 | $ 950.0

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