Reportable Business Segments (Geographic Information) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Property, plant and equipment, net of accumulated depreciation of $1,022.3 and $956.8 in 2025 and 2024, respectively	$ 847.5	$ 800.1
United States [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net of accumulated depreciation of $1,022.3 and $956.8 in 2025 and 2024, respectively	570.4	537.3
Mexico [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net of accumulated depreciation of $1,022.3 and $956.8 in 2025 and 2024, respectively	266.6	254.0
Canada [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net of accumulated depreciation of $1,022.3 and $956.8 in 2025 and 2024, respectively	3.7	2.9
International [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net of accumulated depreciation of $1,022.3 and $956.8 in 2025 and 2024, respectively	$ 6.8	$ 5.9