Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Dec. 31, 2023

Equity [Abstract]

Schedule of Components of Accumulated Other Comprehensive Loss

The following table presents the changes in the components of accumulated other comprehensive loss, net of tax:

($ in millions)	Derivatives		Equity affiliate investment AOCI		Defined benefit pension and other postretirement plans		Foreign currency translation		Total
Balance, December 31, 2020	$	(1.9)	$	0.6	$	(40.5)	$	(68.8)	$	(110.6)
Other comprehensive income (loss) before reclassifications	(1.4)		0.9		7.4		(59.3)		(52.4)
Amounts reclassified out	2.1		—		1.3		—		3.4
Other comprehensive income (loss), net of tax	0.7		0.9		8.7		(59.3)		(49.0)
Balance, December 31, 2021	(1.2)		1.5		(31.8)		(128.1)		(159.6)
Other comprehensive (loss) income before reclassifications	0.5		0.1		(9.3)		(47.3)		(56.0)
Amounts reclassified out	0.9		—		31.7		—		32.6
Other comprehensive (loss) income, net of tax	1.4		0.1		22.4		(47.3)		(23.4)
Balance, December 31, 2022	0.2		1.6		(9.4)		(175.4)		(183.0)
Other comprehensive income (loss) before reclassifications	(6.8)		0.7		0.8		39.4		34.1
Amounts reclassified out	6.6		—		(1.5)		—		5.1
Other comprehensive income (loss), net of tax	(0.2)		0.7		(0.7)		39.4		39.2
Balance, December 31, 2023	$	—	$	2.3	$	(10.1)	$	(136.0)	$	(143.8)

Schedule of Reclassification out of Accumulated Other Comprehensive Loss

A summary of the reclassifications out of accumulated other comprehensive loss is presented in the following table ($ in millions):

Detail of components	2023		2022		2021		Location on Statement of Income
Gains (losses) on derivatives:
Foreign currency contracts	$	(1.5)	$	1.4	$	(1.1)	Net sales
Foreign currency contracts	(3.1)		(4.1)		(2.4)		Cost of goods and services sold
Foreign currency contracts	(4.2)		2.4		1.2		Other expense (income)
Forward treasury locks	(0.3)		(0.3)		(0.4)		Interest expense
Total before tax	(9.1)		(0.6)		(2.7)
Tax benefit (expense)	2.5		(0.3)		0.6
Net of tax	$	(6.6)	$	(0.9)	$	(2.1)
Amortization of defined benefit pension and other postretirement plans:
Prior service credit	$	—	$	—	$	0.3	(a)
Actuarial gains (losses)	1.7		0.6		(0.2)		(a)
Settlements	(0.1)		(52.2)		(1.8)		(a)
Other	0.4		(0.4)		—		(a)
Total before tax	2.0		(52.0)		(1.7)
Tax (expense) benefit	(0.5)		20.3		0.4
Net of tax	$	1.5	$	(31.7)	$	(1.3)
Total reclassifications for the period, net of tax	$	(5.1)	$	(32.6)	$	(3.4)

(a) These components are included in the computation of net periodic benefit cost. Please refer to Note 15, Benefit Plans, for additional details.