Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2023

Equity [Abstract]

Reclassification of Accumulated Other Comprehensive Income (Loss)

The changes in Accumulated other comprehensive income by component are summarized below:

($ in millions)	Foreign currency translation adjustments			Other adjustments (b)			Total
Balance, December 31, 2020	$	198.3		$	(4.5)		$	193.8
Other comprehensive loss before reclassifications, net of income taxes	(13.4)			—			(13.4)
Amounts reclassified from accumulated other comprehensive income:
Increase	—			1.9		(a)	1.9
Income tax impact	—			(0.6)			(0.6)
Amounts reclassified from accumulated other comprehensive income, net of income taxes	—			1.3			1.3
Net current period other comprehensive (loss) income, net of income taxes	(13.4)			1.3			(12.1)
Balance, December 31, 2021	184.9			(3.2)			181.7
Other comprehensive loss before reclassifications, net of income taxes	(77.1)			—			(77.1)
Amounts reclassified from accumulated other comprehensive income:
Increase	—			2.0		(a)	2.0
Income tax impact	—			(0.5)			(0.5)
Amounts reclassified from accumulated other comprehensive income, net of income taxes	—			1.5			1.5
Net current period other comprehensive (loss) income, net of income taxes	(77.1)			1.5			(75.6)
Balance, December 31, 2022	107.8			(1.7)			106.1
Other comprehensive loss before reclassifications, net of income taxes	(1.6)			—			(1.6)
Amounts reclassified from accumulated other comprehensive income:
Sale of business	0.3		(c)	—			0.3
Increase	—			0.1		(a)	0.1
Amounts reclassified from accumulated other comprehensive income, net of income taxes	0.3			0.1			0.4
Net current period other comprehensive (loss) income, net of income taxes	(1.3)			0.1			(1.2)
Balance, December 31, 2023	$	106.5		$	(1.6)		$	104.9
(a) This accumulated other comprehensive income component is included in the computation of net periodic pension cost.
(b) Includes balances relating to defined benefit plans and supplemental executive retirement plans.
(c) Reclassified to Gain on sale of business in the Consolidated Statements of Earnings and Comprehensive Income.