Discontinued Operations - Schedule of Assets and Liabilities From Discontinued Operations (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Current assets held for sale	$ 0.0	$ 788.6
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Current liabilities held for sale	$ 0.0	159.1
Held-for-sale or Disposed of by Sale | TransCore Holdings Inc, Zetec and Civco Radiotherapy
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Accounts receivable, net		74.7
Inventories, net		47.8
Unbilled receivables		158.2
Goodwill		405.5
Other intangible assets, net		31.0
Other current assets		71.4
Current assets held for sale		788.6
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Accounts payable		40.3
Accrued compensation		27.0
Deferred taxes		29.5
Other current liabilities		62.3
Current liabilities held for sale		$ 159.1