OPERATING SEGMENTS (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($) segment	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Financial information of reportable segments
Number of operating units | segment			10						10
Number of reportable segments | segment									3
Net sales	$ 3,938.4	$ 3,958.1	$ 3,852.1	$ 3,571.6	$ 3,671.2	$ 3,669.3	$ 3,580.6	$ 3,266.7	$ 15,320.2	$ 14,187.8	$ 12,733.1
Operating Income (Loss)	$ 590.0	$ 566.0	$ 484.7	$ 351.6	$ 399.2	$ 483.0	$ 425.8	$ 254.5	1,992.3	1,562.5	1,598.6
Previously Reported | Valued at 2022 Fixed Currency Rates
Financial information of reportable segments
Net sales										14,187.8	12,733.1
Operating Income (Loss)										1,562.5	1,598.6
Previously Reported | Valued at 2023 Fixed Currency Rates
Financial information of reportable segments
Net sales										14,187.8	12,733.1
Operating Income (Loss)										1,562.5	1,598.6
Operating segment | Valued at 2021 Management Rates
Financial information of reportable segments
Net sales									15,275.4	14,093.4	12,166.2
Operating Income (Loss)									1,987.0	1,546.3	1,488.1
Operating segment | Previously Reported | Valued at 2022 Fixed Currency Rates
Financial information of reportable segments
Net sales										14,473.1	12,483.6
Operating Income (Loss)										1,612.6	1,551.1
Operating segment | Previously Reported | Valued at 2023 Fixed Currency Rates
Financial information of reportable segments
Net sales										14,093.4	12,166.2
Operating Income (Loss)										1,546.3	1,488.1
Operating segment | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales										(379.7)	(317.4)
Operating Income (Loss)										(66.3)	(63.0)
Operating segment | Global Industrial
Financial information of reportable segments
Net sales									7,221.8	6,805.0	6,237.9
Operating segment | Global Industrial | Valued at 2021 Management Rates
Financial information of reportable segments
Net sales									7,193.1	6,736.3	5,908.5
Operating Income (Loss)									1,080.7	935.8	943.4
Operating segment | Global Industrial | Previously Reported | Valued at 2022 Fixed Currency Rates
Financial information of reportable segments
Net sales										6,944.0	6,086.8
Operating Income (Loss)										977.0	985.7
Operating segment | Global Industrial | Previously Reported | Valued at 2023 Fixed Currency Rates
Financial information of reportable segments
Net sales										6,736.3	5,908.5
Operating Income (Loss)										935.8	943.4
Operating segment | Global Industrial | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales										(207.7)	(178.3)
Operating Income (Loss)										(42.0)	(42.7)
Operating segment | Global Industrial | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Operating Income (Loss)										0.8	0.4
Operating segment | Global Institutional and Specialty
Financial information of reportable segments
Net sales									4,999.2	4,432.1	3,966.8
Operating segment | Global Institutional and Specialty | Valued at 2021 Management Rates
Financial information of reportable segments
Net sales									4,994.0	4,414.3	3,856.7
Operating Income (Loss)									823.0	621.7	536.7
Operating segment | Global Institutional and Specialty | Previously Reported | Valued at 2022 Fixed Currency Rates
Financial information of reportable segments
Net sales										4,480.0	3,908.8
Operating Income (Loss)										634.5	545.7
Operating segment | Global Institutional and Specialty | Previously Reported | Valued at 2023 Fixed Currency Rates
Financial information of reportable segments
Net sales										4,414.3	3,856.7
Operating Income (Loss)										621.7	536.7
Operating segment | Global Institutional and Specialty | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales										(75.9)	(63.0)
Operating Income (Loss)										(11.2)	(7.6)
Operating segment | Global Institutional and Specialty | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Net sales										10.2	10.9
Operating Income (Loss)										(1.6)	(1.4)
Operating segment | Global Healthcare and Life Sciences
Financial information of reportable segments
Net sales									1,586.0	1,510.5	1,181.6
Operating segment | Global Healthcare and Life Sciences | Valued at 2021 Management Rates
Financial information of reportable segments
Net sales									1,576.9	1,505.8	1,101.1
Operating Income (Loss)									160.0	193.3	141.0
Operating segment | Global Healthcare and Life Sciences | Previously Reported | Valued at 2022 Fixed Currency Rates
Financial information of reportable segments
Net sales										1,570.0	1,149.6
Operating Income (Loss)										205.0	152.3
Operating segment | Global Healthcare and Life Sciences | Previously Reported | Valued at 2023 Fixed Currency Rates
Financial information of reportable segments
Net sales										1,505.8	1,101.1
Operating Income (Loss)										193.3	141.0
Operating segment | Global Healthcare and Life Sciences | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales										(64.2)	(48.5)
Operating Income (Loss)										(9.9)	(9.7)
Operating segment | Global Healthcare and Life Sciences | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Operating Income (Loss)										(1.8)	(1.6)
Operating segment | Other
Financial information of reportable segments
Net sales									1,444.2	1,316.4	1,207.7
Operating segment | Other | Valued at 2021 Management Rates
Financial information of reportable segments
Net sales									1,442.3	1,313.3	1,162.5
Operating Income (Loss)									255.0	209.9	181.3
Operating segment | Other | Previously Reported | Valued at 2022 Fixed Currency Rates
Financial information of reportable segments
Net sales										1,355.0	1,201.0
Operating Income (Loss)										212.8	184.0
Operating segment | Other | Previously Reported | Valued at 2023 Fixed Currency Rates
Financial information of reportable segments
Net sales										1,313.3	1,162.5
Operating Income (Loss)										209.9	181.3
Operating segment | Other | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales										(31.5)	(27.6)
Operating Income (Loss)										(5.5)	(5.3)
Operating segment | Other | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Net sales										(10.2)	(10.9)
Operating Income (Loss)										2.6	2.6
Operating segment | Corporate
Financial information of reportable segments
Net sales									69.0	123.8	139.1
Currency impact
Financial information of reportable segments
Net sales									44.8	94.4	566.9
Operating Income (Loss)									5.3	16.2	110.5
Currency impact | Previously Reported | Valued at 2022 Fixed Currency Rates
Financial information of reportable segments
Net sales										(285.3)	249.5
Operating Income (Loss)										(50.1)	47.5
Currency impact | Previously Reported | Valued at 2023 Fixed Currency Rates
Financial information of reportable segments
Net sales										94.4	566.9
Operating Income (Loss)										16.2	110.5
Currency impact | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales										379.7	317.4
Operating Income (Loss)										66.3	63.0
Corporate | Valued at 2021 Management Rates
Financial information of reportable segments
Net sales									69.1	123.7	137.4
Operating Income (Loss)									$ (331.7)	(414.4)	(314.3)
Corporate | Previously Reported | Valued at 2022 Fixed Currency Rates
Financial information of reportable segments
Net sales										124.1	137.4
Operating Income (Loss)										(416.7)	(316.6)
Corporate | Previously Reported | Valued at 2023 Fixed Currency Rates
Financial information of reportable segments
Net sales										123.7	137.4
Operating Income (Loss)										(414.4)	(314.3)
Corporate | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales										(0.4)
Operating Income (Loss)										$ 2.3	$ 2.3