Goodwill and Other Intangibles Resulting from Business Acquisitions - Schedule of Changes in Net Carrying Amount of Goodwill (Details) $ in Millions	6 Months Ended
Jun. 30, 2026 USD ($)
Changes in the net carrying amount of goodwill
Goodwill as of December 31, 2025	$ 2,272.5
Acquisition adjustments	0.4
Translation adjustments	(10.9)
Goodwill as of June 30, 2026	2,262.0
Materials Group
Changes in the net carrying amount of goodwill
Goodwill as of December 31, 2025	886.0
Acquisition adjustments	0.4
Translation adjustments	(5.2)
Goodwill as of June 30, 2026	881.2
Solutions Group
Changes in the net carrying amount of goodwill
Goodwill as of December 31, 2025	1,386.5
Acquisition adjustments	0.0
Translation adjustments	(5.7)
Goodwill as of June 30, 2026	$ 1,380.8

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details