ACQUISITIONS AND DIVESTITURES - Narrative (Details) $ / shares in Units, $ in Millions, $ in Millions					3 Months Ended									9 Months Ended	12 Months Ended
	Oct. 11, 2023 USD ($)	Jul. 27, 2022 USD ($)	Jul. 27, 2022 AUD ($)	May 16, 2022 USD ($) business $ / shares	Sep. 30, 2024 USD ($) business	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) $ / shares	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) business $ / shares	Sep. 30, 2023 USD ($) business $ / shares	Sep. 30, 2022 USD ($) business $ / shares	Sep. 30, 2021 USD ($)
Business Acquisition [Line Items]
Sales					$ 4,619	$ 4,380	$ 4,376	$ 4,117	$ 4,090	$ 3,946	$ 3,756	$ 3,373			$ 17,492	$ 15,165	$ 13,804
Acquisition/divestiture costs															96	69	91
Amortization of intangible assets															1,366	764	530
Mark-to-market gain																24	(50)
Proceeds from issuance of debt																		$ 3,000
Gain on sale of business															539	13,393	486
Gain (loss) on disposition of business															48
Purchases of businesses, net of cash acquired															8,342	705	5,702
Goodwill					$ 18,067				14,480					$ 14,480	18,067	14,480	$ 13,946
Goodwill, expected tax deductible amount	$ 121
Percent of consolidated sales																	2.00%
Proceeds from subordinated interest												$ 15	$ 438		79	161
Gain on subordinated interest													453		79	161	$ 453
Gain from periodic distribution from retained subordinated interest in Vertiv (VRT), net of tax													$ 358		$ 60	$ 122
Gain from periodic distribution from retained subordinated interest in Vertiv (VRT), net of tax, per diluted share (in dollars per share) | $ / shares													$ 0.60		$ 0.10	$ 0.21
Final Control
Business Acquisition [Line Items]
Number of divestitures | business					2										2
Gain (loss) on disposition of business															$ 48
Disposal group, not discontinued operation, gain (loss) on disposal, net of tax															$ 50
Gain loss on sale of business tax per share (in usd per share) | $ / shares															$ 0.09
RUSSIAN FEDERATION
Business Acquisition [Line Items]
Gain on sale of business																$ 47	(181)
Disposal group, not discontinued operation, gain (loss) on disposal, net of tax																$ 47	$ 190
Disposal group, loss on disposal, net of tax, per diluted share (in dollars per share) | $ / shares																$ 0.08	$ 0.32
RUSSIAN FEDERATION | Operations
Business Acquisition [Line Items]
Gain on sale of business																	$ (36)
RUSSIAN FEDERATION | Other Deductions
Business Acquisition [Line Items]
Gain on sale of business																	(145)
RUSSIAN FEDERATION | Restructuring Costs
Business Acquisition [Line Items]
Gain on sale of business																	(10)
AspenTech
Business Acquisition [Line Items]
Noncontrolling interest, ownership percentage				45.00%
Acquisition-Related Costs
Business Acquisition [Line Items]
Interest expense																	56
National Instruments
Business Acquisition [Line Items]
Net sales	1,700
Sales																$ 170
Acquisition including sales															$ 1,464	1,693
Net loss since acquisition date															(537)
Acquisition/divestiture costs														110		205	84
Amortization of intangible assets																424
Net earnings from continuing operations common stockholders															$ 1,982	1,508
Goodwill	$ 3,442
National Instruments | National Instruments
Business Acquisition [Line Items]
Acquisition/divestiture costs														88
National Instruments | Backlog Amortization
Business Acquisition [Line Items]
Amortization of intangible assets																136
National Instruments | Fair Value Adjustment to Inventory
Business Acquisition [Line Items]
Net earnings from continuing operations common stockholders																213
National Instruments | Retention Bonus
Business Acquisition [Line Items]
Net earnings from continuing operations common stockholders																55
AspenTech
Business Acquisition [Line Items]
Sales																752	356
Acquisition/divestiture costs																	91
Amortization of intangible assets																$ 258
Net earnings from continuing operations common stockholders																	1,916
Mark-to-market gain																	$ 97
Number of businesses contributed | business				2
Cash contribution to AspenTech shareholders				$ 6,000
Percentage of voting interest acquired				55.00%
Proceeds from noncontrolling interests				$ 5,900
Adjustments to additional paid in capital				$ 550
Approximate per share payout (in dollars per share) | $ / shares				$ 87.69
Cash remaining on balance sheet				$ 168
Goodwill				7,225
Goodwill, expected tax deductible amount				$ 34
Other Segment Transactions
Business Acquisition [Line Items]
Number of businesses acquired | business															2	2
Purchases of businesses, net of cash acquired																$ 715
Goodwill									424					424		424
Goodwill, expected tax deductible amount									0					0		0
Identifiable intangible assets									$ 323					$ 323		$ 323
Intangible assets, weighted average useful life																9 years
Micromine
Business Acquisition [Line Items]
Purchase price		$ 623	$ 900
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Number of businesses acquired | business																	3
Purchases of businesses, net of cash acquired																	$ 130
Annualized sales																	$ 40
Series of Individually Immaterial Business Acquisitions | Control Systems & Software
Business Acquisition [Line Items]
Number of businesses acquired | business																	2
Series of Individually Immaterial Business Acquisitions | AspenTech
Business Acquisition [Line Items]
Number of businesses acquired | business																	1
2023 Transactions
Business Acquisition [Line Items]
Acquisition/divestiture costs																$ 198