Segment Reporting - Segment Results (Details) - USD ($) $ in Millions		12 Months Ended
	Sep. 30, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting [Abstract]
Revenues		$ 6,876.1	$ 5,916.3	$ 5,152.4
Adjusted EBITDA		1,960.1	1,561.5	1,325.1
Less items to reconcile Segment Adjusted EBITDA to Income from Continuing Operations Before Income Taxes:
Interest expense		156.7	103.2	87.7
Restructuring and related business transformation costs		22.9	32.3	18.8
Acquisition related expenses and non-cash charges		52.2	38.7	55.3
Stock-based compensation		51.9	78.9	87.2
Foreign currency transaction losses (gains), net		5.1	(5.9)	(12.0)
Loss on extinguishment of debt	$ 9.0	13.5	1.1	9.0
Adjustments to LIFO inventories		12.0	36.1	33.2
Income Before Income Taxes		1,031.1	742.2	513.0
Depreciation of rental equipment		3.7	3.4	4.1
Restructuring Costs [Abstract]
Restructuring charges		19.9	29.3	13.4
Facility reorganization, relocation and other costs		3.0	3.0	3.1
Other, net		0.0	0.0	2.3
Total restructuring and related business transformation costs		22.9	32.3	18.8
Stock-based compensation expense recognized in continuing operations			78.9	87.2
Increase (decrease) in stock-based compensation expense due to costs associated with employer taxes			6.7	8.7
Total depreciation and amortization expense		459.1	432.8	422.1
Total capital expenditures		105.4	94.6	64.1
Total identifiable assets		15,563.5	14,765.9
Industrial Technologies and Services
Segment Reporting [Abstract]
Revenues		5,632.8	4,705.1
Precision and Science Technologies
Segment Reporting [Abstract]
Revenues		1,243.3	1,211.2
Operating segments | Industrial Technologies and Services
Segment Reporting [Abstract]
Revenues		5,632.8	4,705.1	4,161.0
Adjusted EBITDA		1,587.3	1,214.0	1,033.7
Restructuring Costs [Abstract]
Total depreciation and amortization expense		313.8	294.7	296.6
Total capital expenditures		83.9	66.3	53.1
Total identifiable assets		10,138.8	9,204.7
Operating segments | Precision and Science Technologies
Segment Reporting [Abstract]
Revenues		1,243.3	1,211.2	991.4
Adjusted EBITDA		372.8	347.5	291.4
Restructuring Costs [Abstract]
Total depreciation and amortization expense		135.4	133.6	108.3
Total capital expenditures		18.5	17.7	10.7
Total identifiable assets		3,464.7	3,540.4
Corporate and other
Less items to reconcile Segment Adjusted EBITDA to Income from Continuing Operations Before Income Taxes:
Corporate expenses not allocated to segments		173.3	126.7	133.2
Restructuring Costs [Abstract]
Total depreciation and amortization expense		9.9	4.5	17.2
Total capital expenditures		3.0	10.6	0.3
Total identifiable assets		1,960.0	2,020.8
Assets of discontinued operations
Less items to reconcile Segment Adjusted EBITDA to Income from Continuing Operations Before Income Taxes:
Interest expense		156.7	103.2	87.7
Depreciation and amortization expense		455.4	429.4	418.0
Restructuring and related business transformation costs		22.9	32.3	18.8
Acquisition related expenses and non-cash charges		63.9	40.7	65.2
Stock-based compensation		51.9	85.6	95.9
Foreign currency transaction losses (gains), net		5.1	(5.9)	(12.0)
Loss on extinguishment of debt		13.5	1.1	9.0
Adjustments to LIFO inventories		12.0	36.1	33.2
Cybersecurity incident costs		2.3	0.0	0.0
Gain on settlement of post-acquisition contingencies		0.0	(6.2)	(30.1)
Other adjustments		(28.0)	(23.7)	(6.8)
Restructuring Costs [Abstract]
Total restructuring and related business transformation costs		$ 22.9	$ 32.3	$ 18.8