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Business Combinations - Net Asset Acquired (Details) - USD ($) $ in Millions	Sep. 30, 2021	Jul. 01, 2021	Dec. 31, 2020
Net assets acquired:
Goodwill	$ 952.7		$ 865.9
L.A. Turbine
Net assets acquired:
Identifiable intangible assets		$ 43.7
Goodwill		42.1
Other assets		4.6
Property, plant and equipment		2.6
Cash and cash equivalents		1.4
Liabilities		(16.4)
Net assets acquired		$ 78.0