Discontinued Operations (Schedule of Assets and Liabilities From Discontinued Operations) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Current assets held for sale	$ 788.6	$ 324.2
Assets held for sale	0.0	521.6
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Current liabilities held for sale	159.1	120.8
Liabilities held for sale	0.0	64.1
Held-for-sale or Disposed of by Sale | TransCore and Zetec and CIVCO Radiotherapy
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Accounts receivable, net	74.7	117.3
Inventories, net	47.8	33.3
Unbilled receivables	158.2	168.9
Goodwill	405.5	0.0
Other intangible assets, net	31.0	0.0
Other current assets	71.4	4.7
Current assets held for sale	788.6	324.2
Goodwill	0.0	429.2
Other intangible assets, net	0.0	38.7
Other assets	0.0	53.7
Assets held for sale	0.0	521.6
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Accounts payable	40.3	50.7
Accrued compensation	27.0	23.5
Deferred taxes	29.5	31.0
Other current liabilities	62.3	46.6
Current liabilities held for sale	159.1	120.8
Other liabilities	0.0	33.1
Liabilities held for sale	$ 0.0	$ 64.1