STATEMENTS OF CONSOLIDATED INCOME - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2025		Dec. 31, 2024	[1]	Dec. 31, 2023	[1]
Income Statement [Abstract]
Net sales		$ 3,373.0		$ 3,024.0		$ 3,087.0
Costs and expenses:
Cost of products sold, excluding depreciation and amortization		2,930.6		2,666.6		2,728.2
Depreciation and amortization		122.5		116.4		108.6
Selling, general, administrative, research and development		129.2		120.8		122.7
Restructuring costs		1.9		7.6		5.0
Other operating charges, net		0.0		0.4		0.0
Total costs and expenses		3,184.2		2,911.8		2,964.5
Operating income		188.8		112.2		122.5
Other (expense) income:
Interest expense		(50.1)		(43.7)		(46.9)
Other income, net - Note 13		11.3		19.5		7.4
Income before income taxes		150.0		88.0		83.0
Income tax provision		(37.5)		(22.3)	[2]	(15.2)	[2]
Net income	[4]	$ 112.5	[3]	$ 65.7		$ 67.8
Net income per common share:
Basic		$ 6.96		$ 4.08		$ 4.25
Diluted		$ 6.77		$ 4.02		$ 4.21
Weighted-average number of common shares outstanding (in thousands):
Basic		16,169		16,069		15,991
Diluted		16,622		16,319		16,131

[1] Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 18 for further discussion.

[2] Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 18 for further discussion.

[3] Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 18 for further discussion.

[4] See Note 16 for supplemental disclosure of cash flow information.