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Debt and Financing Arrangements - Classification of the Company Lease Obligations (Detail) - USD ($)
$ in Millions
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Jun. 30, 2022
Operating Lease Obligations:        
Other Current Liabilities (current portion) $ 1.7 $ 1.7 $ 1.5 $ 1.5
Other Noncurrent Liabilities (long-term portion) 3.5 3.5 2.8 2.9
Total Operating Lease Obligations 5.2   4.3 4.4
Capital Lease Obligations:        
Other Current Liabilities (current portion) 0.1 0.1 0.1 0.1
Other Noncurrent Liabilities (long-term portion) 0.3 $ 0.3 0.1 0.1
Total Capital Lease Obligations 0.4   0.2 0.2
Total Lease Obligations 5.6   $ 4.5 $ 4.6
Lease Obligations [Member]        
Operating Lease Obligations:        
Total Operating Lease Obligations $ 5,247.0