Benefit Plans - Estimated future benefit payments (Detail) $ in Millions	Dec. 31, 2025 USD ($)
Pension plans
Defined Benefit Plan Disclosure [Line Items]
2026	$ 7.8
2027	8.2
2028	8.6
2029	8.2
2030	7.8
2031 - 2035	33.3
Other post-retirement plans
Defined Benefit Plan Disclosure [Line Items]
2026	1.0
2027	0.9
2028	0.8
2029	0.7
2030	0.6
2031 - 2035	$ 2.3