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Employee Benefit Plans (Net Periodic Benefit Costs) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service costs	$ 0.0	$ 0.1	$ 0.1	$ 0.1
Interest costs	2.4	2.5	7.2	7.6
Amortization of net actuarial loss	0.6	0.4	1.7	1.5
Net periodic costs	$ 3.0	$ 3.0	$ 9.0	$ 9.2

X

- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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X

- Definition

Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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- Definition

Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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