Discontinued Operations - Schedule of Amounts Included in Discontinued Operations (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Earnings from discontinued operations, net of tax	$ 54,500,000	$ 81,900,000	$ 121,300,000	$ 147,900,000
Gain / (loss) on disposition of discontinued operations, net of tax	(10,700,000)	0	1,706,600,000	0
Net earnings from discontinued operations	43,800,000	81,900,000	1,827,900,000	147,900,000
Industrial Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation and amortization	2,500,000	4,800,000	6,400,000	9,800,000
Held-for-sale or Disposed of by Sale | TransCore Holdings Inc, Zetec and Civco Radiotherapy
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	0	161,000,000.0	100,400,000	313,500,000
Cost of sales	0	94,200,000	71,200,000	188,900,000
Gross profit	0	66,800,000	29,200,000	124,600,000
Selling, general and administrative expenses	0	30,300,000	19,900,000	62,200,000
Income from operations	0	36,500,000	9,300,000	62,400,000
Other income (expense), net	0	1,300,000	100,000	1,200,000
Earnings before income taxes	0	37,800,000	9,400,000	63,600,000
Income taxes	0	4,500,000	(6,200,000)	11,200,000
Earnings from discontinued operations, net of tax	0	33,300,000	15,600,000	52,400,000
Gain / (loss) on disposition of discontinued operations, net of tax	(10,700,000)	0	1,706,600,000	0
Net earnings from discontinued operations	(10,700,000)	33,300,000	1,722,200,000	52,400,000
Stock-based compensation expense			4,500,000
Depreciation and amortization	0	1,600,000	0	3,500,000
Held-for-sale or Disposed of by Sale | Industrial Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	255,100,000	236,800,000	501,900,000	457,600,000
Cost of sales	121,400,000	108,700,000	235,300,000	209,800,000
Gross profit	133,700,000	128,100,000	266,600,000	247,800,000
Selling, general and administrative expenses	66,800,000	62,800,000	134,500,000	125,500,000
Income from operations	66,900,000	65,300,000	132,100,000	122,300,000
Other income (expense), net	900,000	(200,000)	1,100,000	(500,000)
Earnings before income taxes	67,800,000	65,100,000	133,200,000	121,800,000
Income taxes	13,300,000	16,500,000	27,500,000	26,300,000
Earnings from discontinued operations, net of tax	54,500,000	48,600,000	105,700,000	95,500,000
Stock-based compensation expense	$ 2,600,000	$ 3,400,000	$ 5,500,000	$ 6,000,000.0