v3.26.1
Debt and Financing Arrangements - Borrowing Limits Amounts Outstanding And Amounts Available Under Revolving Credit Facility (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Debt Instrument [Line Items]      
Short-Term Borrowings Outstanding $ 234.8 $ 255.7 $ 171.4
Revolving Credit Facility      
Debt Instrument [Line Items]      
Revolving Credit Facility, Limit 275.0 275.0 275.0
Short-Term Borrowings Outstanding 106.2 169.7 171.4
Available Revolving Credit Facility $ 168.8 $ 105.3 $ 103.6