ACQUISITIONS AND DIVESTITURES - Narrative (Details) $ / shares in Units, $ in Millions		3 Months Ended					6 Months Ended		9 Months Ended	12 Months Ended
	Oct. 11, 2023 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($) business	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) $ / shares	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)
Business Acquisition [Line Items]
Earnings		$ 4,376			$ 3,756		$ 8,493	$ 7,129
Mark-to-market gain (loss)					(14)			21
Acquisition/divestiture costs		5			10		85	10
Gain on subordinated interest		79			0		79	0
Loss on divestiture of business		39			0		39	0
Purchase price of businesses, net of cash acquired							8,342	0
Goodwill		17,964		$ 14,480			17,964		$ 14,480	$ 14,480
Goodwill expected tax deductible amount	$ 130
Gain (loss) on sale of business					3			2,783
Russia
Business Acquisition [Line Items]
Gain (loss) on sale of business			$ (47)			$ (47)
Loss on disposal (in dollars per share) | $ / shares						$ 0.08
National Instruments
Business Acquisition [Line Items]
Net sales	1,700
Earnings										170
Acquisition including sales		367			437		749	885
Net loss since acquisition date		80					406
Amortization of intangible assets		141			107		280	212
Mark-to-market gain (loss)					35
Acquisition/divestiture costs		16					146	198	110
Net earnings from continuing operations common stockholders		$ 530			447		$ 950	306
Goodwill	$ 3,407
National Instruments | National Instruments
Business Acquisition [Line Items]
Acquisition/divestiture costs									88
National Instruments | Backlog Amortization
Business Acquisition [Line Items]
Amortization of intangible assets					$ 34			68
National Instruments | Retention Bonus
Business Acquisition [Line Items]
Net earnings from continuing operations common stockholders								47
National Instruments | Fair Value Adjustment to Inventory
Business Acquisition [Line Items]
Net earnings from continuing operations common stockholders								$ 213
Other Segment Transactions
Business Acquisition [Line Items]
Number of businesses acquired | business				2
Purchase price of businesses, net of cash acquired				$ 715
Goodwill				423					423	423
Goodwill expected tax deductible amount				0					0	0
Intangible assets				$ 323					$ 323	$ 323
Weighted-average useful life				9 years