Goodwill And Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Goodwill
Beginning balance	$ 2,179.6	$ 2,182.6
Acquisition	6.8	7.6
Purchase accounting adjustments	(1.6)
Foreign currency translation and other	67.9	(10.6)
Ending balance	2,252.7	2,179.6
Electronics
Goodwill
Beginning balance	1,223.4	1,226.7
Acquisition	0.0	7.6
Purchase accounting adjustments	(1.6)
Foreign currency translation and other	52.2	(10.9)
Ending balance	1,274.0	1,223.4
Industrial & Specialty
Goodwill
Beginning balance	956.2	955.9
Acquisition	6.8	0.0
Purchase accounting adjustments	0.0
Foreign currency translation and other	15.7	0.3
Ending balance	$ 978.7	$ 956.2