OPERATING SEGMENTS (Details) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) item segment	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Financial information of reportable segments
Number of operating units | segment			10
Number of reportable segments | item			3
Net sales	$ 3,852.1	$ 3,580.6	$ 7,423.7	$ 6,847.3
Operating Income (Loss)	484.7	425.8	836.3	680.3
Previously Reported | Valued at 2022 Management Rates
Financial information of reportable segments
Net sales					$ 14,187.8
Operating Income (Loss)					1,562.5
Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales					14,187.8
Operating Income (Loss)					1,562.5
Global Industrial
Financial information of reportable segments
Net sales	1,808.5	1,689.9	3,517.9	3,255.6
Global Institutional and Specialty
Financial information of reportable segments
Net sales	1,272.2	1,129.3	2,401.0	2,138.7
Global Healthcare and Life Sciences
Financial information of reportable segments
Net sales	390.8	390.9	770.5	753.7
Other
Financial information of reportable segments
Net sales	363.9	336.6	693.9	630.6
Corporate
Financial information of reportable segments
Net sales	16.7	33.9	40.4	68.7
Operating segment
Financial information of reportable segments
Net sales	3,831.0	3,522.2	7,388.4	6,694.5
Operating Income (Loss)	481.4	414.8	830.4	653.3
Operating segment | Previously Reported | Valued at 2022 Management Rates
Financial information of reportable segments
Net sales					14,473.1
Operating Income (Loss)					1,612.6
Operating segment | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales					14,093.4
Operating Income (Loss)					1,546.3
Operating segment | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales					(379.7)
Operating Income (Loss)					(66.3)
Operating segment | Global Industrial
Financial information of reportable segments
Net sales	1,795.6	1,653.3	3,494.9	3,164.7
Operating Income (Loss)	255.4	216.8	471.0	396.7
Operating segment | Global Industrial | Previously Reported | Valued at 2022 Management Rates
Financial information of reportable segments
Net sales					6,944.0
Operating Income (Loss)					977.0
Operating segment | Global Industrial | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales					6,736.3
Operating Income (Loss)					935.8
Operating segment | Global Industrial | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales					(207.7)
Operating Income (Loss)					(42.0)
Operating segment | Global Industrial | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Operating Income (Loss)					0.8
Operating segment | Global Institutional and Specialty
Financial information of reportable segments
Net sales	1,268.6	1,118.2	2,395.2	2,109.5
Operating Income (Loss)	208.7	148.6	334.4	257.2
Operating segment | Global Institutional and Specialty | Previously Reported | Valued at 2022 Management Rates
Financial information of reportable segments
Net sales					4,480.0
Operating Income (Loss)					634.5
Operating segment | Global Institutional and Specialty | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales					4,414.3
Operating Income (Loss)					621.7
Operating segment | Global Institutional and Specialty | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales					(75.9)
Operating Income (Loss)					(11.2)
Operating segment | Global Institutional and Specialty | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Net sales					10.2
Operating Income (Loss)					(1.6)
Operating segment | Global Healthcare and Life Sciences
Financial information of reportable segments
Net sales	387.5	384.4	766.1	732.6
Operating Income (Loss)	32.7	55.2	67.7	97.1
Operating segment | Global Healthcare and Life Sciences | Previously Reported | Valued at 2022 Management Rates
Financial information of reportable segments
Net sales					1,570.0
Operating Income (Loss)					205.0
Operating segment | Global Healthcare and Life Sciences | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales					1,505.8
Operating Income (Loss)					193.3
Operating segment | Global Healthcare and Life Sciences | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales					(64.2)
Operating Income (Loss)					(9.9)
Operating segment | Global Healthcare and Life Sciences | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Operating Income (Loss)					(1.8)
Operating segment | Other
Financial information of reportable segments
Net sales	362.6	332.5	691.9	619.3
Operating Income (Loss)	63.4	51.6	113.5	88.7
Operating segment | Other | Previously Reported | Valued at 2022 Management Rates
Financial information of reportable segments
Net sales					1,355.0
Operating Income (Loss)					212.8
Operating segment | Other | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales					1,313.3
Operating Income (Loss)					209.9
Operating segment | Other | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales					(31.5)
Operating Income (Loss)					(5.5)
Operating segment | Other | Purchase Price Adjustments | Segment Changes
Financial information of reportable segments
Net sales					(10.2)
Operating Income (Loss)					2.6
Operating segment | Corporate
Financial information of reportable segments
Operating Income (Loss)	(78.8)	(57.4)	(156.2)	(186.4)
Operating segment | Corporate | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales	16.7	33.8	40.3	68.4
Operating segment | Corporate | Previously Reported | Valued at 2022 Management Rates
Financial information of reportable segments
Net sales					124.1
Operating Income (Loss)					(416.7)
Operating segment | Corporate | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales					123.7
Operating Income (Loss)					(414.4)
Operating segment | Corporate | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales					(0.4)
Operating Income (Loss)					2.3
Currency impact
Financial information of reportable segments
Net sales	21.1	58.4	35.3	152.8
Operating Income (Loss)	$ 3.3	$ 11.0	$ 5.9	$ 27.0
Currency impact | Previously Reported | Valued at 2022 Management Rates
Financial information of reportable segments
Net sales					(285.3)
Operating Income (Loss)					(50.1)
Currency impact | Previously Reported | Valued at 2023 Management Rates
Financial information of reportable segments
Net sales					94.4
Operating Income (Loss)					16.2
Currency impact | Purchase Price Adjustments | Changes in Currency Rates
Financial information of reportable segments
Net sales					379.7
Operating Income (Loss)					$ 66.3