Acquisitions, Discontinued Operations, and the Asbestos Portfolio Sale- Acquisition of ASPEQ (Details) - USD ($) $ in Millions	Dec. 31, 2023	Jun. 02, 2023	Dec. 31, 2022	Dec. 31, 2021
Asset acquired :
Goodwill	$ 704.8		$ 455.3	$ 457.3
ASPEQ Parent Holdings, Inc.
Asset acquired :
Current assets, including cash and equivalents of $0.9		$ 42.1
Property, plant and equipment		10.6
Goodwill	$ 191.1	191.1
Intangible assets		246.1
Other assets		1.3
Total assets acquired		491.2
Current liabilities assumed		10.9
Non-current liabilities assumed		57.9
Net assets acquired		422.4
Deferred income tax liabilities		56.9
Other liabilities		$ 1.0