Debt and Financing Arrangements - Borrowing Limits Amounts Outstanding and Amounts Available under Revolving Credit Facility (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Short-Term Borrowings Outstanding	$ 162.0	$ 116.0
Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility, limit	200.0	200.0
Short-Term Borrowings Outstanding	162.0	116.0
Available revolving credit facility	$ 38.0	$ 84.0