Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2023

Discontinued Operations and Disposal Groups [Abstract]

Schedule of disposal groups, including discontinued operations

	Year Ended December 31,
	2023		2022		2021
Net sales	$	180.6	$	210.4	$	161.0
Cost of sales	164.9		220.0		169.3
Selling, general and administrative	15.8		14.2		11.5
Restructuring and other special charges	—		3.9		4.0
Goodwill impairment	—		—		4.6
Operating loss	(0.1)		(27.7)		(28.4)
Interest expense1	(3.3)		(2.8)		(3.0)
Loss from operation of discontinued operations	(3.4)		(30.5)		(31.4)
Loss on sale of discontinued operations	(28.3)		—		—
Loss on classification as held-for-sale	—		(1.8)		—
Income tax benefit	5.5		8.0		5.5
Loss from discontinued operations, net of tax	$	(26.2)	$	(24.3)	$	(25.9)

(1) - Interest expense includes an allocation of interest that is not directly attributable to our Aluminum Products business, totaling $3.0 million, $2.5 million and $2.6 million in 2023, 2022 and 2021, respectively.