Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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OPERATING SEGMENTS (Details) $ in Millions	3 Months Ended		12 Months Ended
OPERATING SEGMENTS (Details) $ in Millions	Mar. 31, 2023 USD ($) segment item	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Financial information of reportable segments
Number of operating units \| segment	10
Number of reportable segments \| item	3
Net sales	$ 3,571.6	$ 3,266.7
Operating Income (Loss)	351.6	254.5
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	1,709.4	1,565.7
Global Institutional and Specialty
Financial information of reportable segments
Net sales	1,128.8	1,009.4
Global Healthcare and Life Sciences
Financial information of reportable segments
Net sales	379.7	362.8
Other
Financial information of reportable segments
Net sales	330.0	294.0
Operating segment
Financial information of reportable segments
Net sales	3,557.4	3,172.3
Operating Income (Loss)	349.0	238.5
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	1,699.3	1,511.4
Operating Income (Loss)	215.6	179.9
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	1,126.6	991.3
Operating Income (Loss)	125.7	108.6
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	378.6	348.2
Operating Income (Loss)	35.0	41.9
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	329.3	286.8
Operating Income (Loss)	50.1	37.1
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
Currency impact
Financial information of reportable segments
Net sales	14.2	94.4
Operating Income (Loss)	2.6	16.0
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
Corporate
Financial information of reportable segments
Net sales	23.7	34.8
Operating Income (Loss)	(77.4)	(129.0)
Corporate \| Valued at 2023 Management Rates
Financial information of reportable segments
Net sales	$ 23.6	$ 34.6
Corporate \| Previously Reported \| Valued at 2022 Management Rates
Financial information of reportable segments
Net sales			124.1
Operating Income (Loss)			(416.7)
Corporate \| Previously Reported \| Valued at 2023 Management Rates
Financial information of reportable segments
Net sales			123.7
Operating Income (Loss)			(414.4)
Corporate \| Purchase Price Adjustments \| Changes in Currency Rates
Financial information of reportable segments
Net sales			(0.4)
Operating Income (Loss)			$ 2.3