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BENEFIT PLANS - Components of Net Periodic Benefit Cost - Pension Benefits) (Details) - Pension Plans, Defined Benefit - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 0.7	$ 0.6	$ 1.4	$ 1.3
Interest cost	8.2	8.5	16.4	17.0
Expected return on plan assets	(7.1)	(6.9)	(14.1)	(13.8)
Amortization of prior service cost	0.3	0.4	0.5	0.7
Amortization of actuarial loss	1.2	1.4	2.5	2.8
Net periodic pension benefit cost	3.3	4.0	6.7	7.9
Pretax reclassifications from AOCI included in net periodic pension benefit cost	$ 1.5	$ 1.8	$ 3.0	$ 3.5

X

- Definition

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

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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

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