OPERATING SEGMENTS (Details) $ in Millions	3 Months Ended		9 Months Ended				12 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 segment	Sep. 30, 2024 item	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Financial information of reportable segments
Number of operating units				8	8
Number of reportable segments | segment				4
Net sales	$ 3,998.5	$ 3,958.1	$ 11,736.2			$ 11,381.8
Operating Income (Loss)	1,044.8	566.0	2,219.6			1,402.3
Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales							$ 15,320.2
Operating Income (Loss)							1,992.3
Previously Reported | Valued at 2024 Management Rates
Financial information of reportable segments
Net sales							15,320.2
Operating Income (Loss)							1,992.3
Global Industrial
Financial information of reportable segments
Net sales	1,966.7	1,945.1	5,742.4			5,663.7
Global Institutional and Specialty
Financial information of reportable segments
Net sales	1,394.2	1,313.0	4,024.8			3,714.0
Global Healthcare and Life Sciences
Financial information of reportable segments
Net sales	330.4	406.2	1,100.0			1,176.7
Global Pest Elimination
Financial information of reportable segments
Net sales	307.2	283.1	869.0			795.5
Corporate
Financial information of reportable segments
Net sales		10.7				31.9
Operating segment
Financial information of reportable segments
Net sales	4,039.4	3,957.0	11,821.9			11,393.5
Operating Income (Loss)	1,055.1	566.1	2,239.8			1,403.1
Operating segment | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales							15,275.4
Operating Income (Loss)							1,987.0
Operating segment | Previously Reported | Valued at 2024 Management Rates
Financial information of reportable segments
Net sales							15,375.5
Operating Income (Loss)							2,002.2
Operating segment | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales							100.1
Operating Income (Loss)							15.2
Operating segment | Global Industrial
Financial information of reportable segments
Net sales	1,993.0	1,940.8	5,790.7			5,655.4
Operating Income (Loss)	349.1	299.1	926.0			783.8
Operating segment | Global Industrial | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales							7,193.1
Operating Income (Loss)							1,080.7
Operating segment | Global Industrial | Previously Reported | Valued at 2024 Management Rates
Financial information of reportable segments
Net sales							7,640.5
Operating Income (Loss)							1,122.0
Operating segment | Global Industrial | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales							40.1
Operating Income (Loss)							2.3
Operating segment | Global Industrial | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Net sales							407.3
Operating Income (Loss)							39.0
Operating segment | Global Institutional and Specialty
Financial information of reportable segments
Net sales	1,403.6	1,314.1	4,046.6			3,719.0
Operating Income (Loss)	325.6	254.9	894.3			598.4
Operating segment | Global Institutional and Specialty | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales							4,994.0
Operating Income (Loss)							823.0
Operating segment | Global Institutional and Specialty | Previously Reported | Valued at 2024 Management Rates
Financial information of reportable segments
Net sales							5,014.6
Operating Income (Loss)							841.8
Operating segment | Global Institutional and Specialty | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales							20.6
Operating Income (Loss)							3.9
Operating segment | Global Institutional and Specialty | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Operating Income (Loss)							14.9
Operating segment | Global Healthcare and Life Sciences
Financial information of reportable segments
Net sales	334.1	408.3	1,112.0			1,189.7
Operating Income (Loss)	35.8	44.7	106.5			113.3
Operating segment | Global Healthcare and Life Sciences | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales							1,576.9
Operating Income (Loss)							160.0
Operating segment | Global Healthcare and Life Sciences | Previously Reported | Valued at 2024 Management Rates
Financial information of reportable segments
Net sales							1,607.5
Operating Income (Loss)							160.8
Operating segment | Global Healthcare and Life Sciences | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales							30.6
Operating Income (Loss)							7.5
Operating segment | Global Healthcare and Life Sciences | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Operating Income (Loss)							(6.7)
Operating segment | Global Pest Elimination
Financial information of reportable segments
Net sales	308.7	283.1	872.6			797.4
Operating Income (Loss)	63.1	59.0	174.1			155.9
Operating segment | Global Pest Elimination | Previously Reported | Valued at 2024 Management Rates
Financial information of reportable segments
Net sales							1,070.2
Operating Income (Loss)							210.4
Operating segment | Global Pest Elimination | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales							8.7
Operating Income (Loss)							1.4
Operating segment | Global Pest Elimination | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Net sales							1,061.5
Operating Income (Loss)							209.0
Operating segment | Other | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales							1,442.3
Operating Income (Loss)							255.0
Operating segment | Other | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Net sales							(1,442.3)
Operating Income (Loss)							(255.0)
Operating segment | Corporate
Financial information of reportable segments
Net sales		10.7				32.0
Operating Income (Loss)	281.5	(91.6)	138.9			(248.3)
Operating segment | Corporate | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales							69.1
Operating Income (Loss)							(331.7)
Operating segment | Corporate | Previously Reported | Valued at 2024 Management Rates
Financial information of reportable segments
Net sales							42.7
Operating Income (Loss)							(332.8)
Operating segment | Corporate | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales							0.1
Operating Income (Loss)							0.1
Operating segment | Corporate | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Net sales							(26.5)
Operating Income (Loss)							(1.2)
Currency impact
Financial information of reportable segments
Net sales	(40.9)	1.1	(85.7)			(11.7)
Operating Income (Loss)	$ (10.3)	$ (0.1)	$ (20.2)			$ (0.8)
Currency impact | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales							44.8
Operating Income (Loss)							5.3
Currency impact | Previously Reported | Valued at 2024 Management Rates
Financial information of reportable segments
Net sales							(55.3)
Operating Income (Loss)							(9.9)
Currency impact | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales							(100.1)
Operating Income (Loss)							$ (15.2)