POSTRETIREMENT BENEFITS (Tables)

12 Months Ended

Dec. 31, 2023

POSTRETIREMENT BENEFITS Disclosure [Abstract]

Postretirement plan change in benefit obligation

Changes in the benefit obligation were as follows:

	December 31, 2023						December 31, 2022
	U.S.		Foreign		Total		U.S.		Foreign		Total
Change in Benefit Obligation	($ in millions)
Benefit obligation - beginning of year	$	28.5	$	6.4	$	34.9	$	39.3	$	11.2	$	50.5
Service cost	0.6		0.1		0.7		0.8		0.3		1.1
Interest cost	1.4		0.4		1.8		0.8		0.3		1.1
Actuarial loss (gain)	1.5		0.2		1.7		(8.0)		(4.2)		(12.2)
Benefits paid	(3.8)		(0.3)		(4.1)		(4.4)		(0.4)		(4.8)
Foreign currency translation adjustments	—		0.2		0.2		—		(0.8)		(0.8)
Benefit obligation - end of year	$	28.2	$	7.0	$	35.2	$	28.5	$	6.4	$	34.9

	December 31, 2023						December 31, 2022
	U.S.		Foreign		Total		U.S.		Foreign		Total
	($ in millions)
Funded status	$	(28.2)	$	(7.0)	$	(35.2)	$	(28.5)	$	(6.4)	$	(34.9)

Amounts recognized in consolidated balance sheet

Amounts recognized in the consolidated balance sheets consisted of:

	December 31, 2023						December 31, 2022
	U.S.		Foreign		Total		U.S.		Foreign		Total
	($ in millions)
Accrued benefit in current liabilities	$	(2.4)	$	(0.3)	$	(2.7)	$	(2.6)	$	(0.3)	$	(2.9)
Accrued benefit in noncurrent liabilities	(25.8)		(6.7)		(32.5)		(25.9)		(6.1)		(32.0)
Accumulated other comprehensive loss	11.0		(2.7)		8.3		10.3		(3.1)		7.2
Net balance sheet impact	$	(17.2)	$	(9.7)	$	(26.9)	$	(18.2)	$	(9.5)	$	(27.7)

Components of net periodic benefit cost

	Years Ended December 31,
	2023		2022		2021
Components of Net Periodic Benefit Cost	($ in millions)
Service cost	$	0.7	$	1.1	$	1.3
Interest cost	1.8		1.1		1.0
Amortization of prior service cost	0.1		0.1		0.1
Recognized actuarial loss	0.5		1.5		2.1
Net periodic benefit cost	$	3.1	$	3.8	$	4.5
	Years Ended December 31,
	2023		2022		2021
Included in Pretax Other Comprehensive Income (Loss)	($ in millions)
Liability adjustment	$	1.7	$	(12.2)	$	(3.8)
Amortization of prior service costs and actuarial losses	(0.6)		(1.6)		(2.2)

Schedule of actuarial assumption

	December 31,
Weighted-Average Assumptions	2023		2022		2021
Discount rate—periodic benefit cost	5.5	%	2.8	%	2.3	%
Discount rate—benefit obligation	5.2	%	5.5	%	2.8	%

Assumed healthcare cost trend rates

The assumed healthcare cost trend rates for pre-65 retirees were as follows:

	December 31,
	2023		2022
Healthcare cost trend rate assumed for next year	7.0	%	7.0	%
Rate that the cost trend rate gradually declines to	4.5	%	4.5	%
Year that the rate reaches the ultimate rate	2033		2032