Long-term debt - Aggregate Maturities of Long-Term Debt and Other (Detail) $ in Millions	Dec. 31, 2023 USD ($)
Long-term debt
2025	$ 442.5
Gross maturities	442.5
Less debt issuance costs	1.6
Total	440.9
Post effect of exchange of old notes into new notes
Long-term debt
2025	83.0
2029 and thereafter	360.8
Gross maturities	443.8
Less debt issuance costs	6.1
Total	$ 437.7