Pension and Post-Employment Benefits - Plan Net Pension Credit (Detail) - United Kingdom Plan [Member] $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3.3
Interest cost on PBO	18.5
Expected return on plan assets	(25.7)
Amortization of prior service credit	0.5
Amortization of actuarial net losses	0.0
Net periodic benefit	$ (3.4)