Acquisitions and Divestitures Narrative (Details) $ / shares in Units, $ in Millions		3 Months Ended				5 Months Ended		9 Months Ended		12 Months Ended	14 Months Ended	27 Months Ended
	Oct. 01, 2020 USD ($)	Jun. 30, 2022 USD ($) $ / shares	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 AUD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	May 16, 2022 USD ($) $ / shares	Sep. 30, 2020 USD ($)
Business Acquisition [Line Items]
Cash and equivalents		$ 2,529,000,000			$ 2,860,000,000			$ 2,529,000,000	$ 2,860,000,000	$ 2,354,000,000				$ 3,315,000,000
Net sales		5,005,000,000			4,697,000,000			14,269,000,000	13,289,000,000
Acquisition/divestiture costs		61,000,000			2,000,000			97,000,000	11,000,000
Proceeds from Issuance of Debt				$ 3,000,000,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		483,000,000			0			483,000,000	0
Purchase price of businesses, net of cash acquired								5,615,000,000	1,611,000,000
Goodwill		14,748,000,000						14,748,000,000		7,723,000,000
Goodwill expected tax deductible amount													$ 34,000,000
Gain from periodic distribution from retained subordinated interest in Vertiv (VRT)		0		$ 453,000,000	0			453,000,000	0
Proceeds from subordinated interest			$ 438,000,000					438,000,000	0
AspenTech
Business Acquisition [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners													45.00%
Acquisition-related Costs
Business Acquisition [Line Items]
Acquisition/divestiture costs									159,000,000
Interest Expense					37,000,000			56,000,000	110,000,000
Therm-O-Disc
Business Acquisition [Line Items]
(Loss) on sale of business, net of tax		$ 428,000,000
Disposal Group, Gain (loss) on disposal, net of tax, per diluted share | $ / shares		$ 0.72
InSinkErator [Member]
Business Acquisition [Line Items]
Disposal Group, Including Discontinued Operation, Revenue								480,000,000		565,000,000
Disposal Group, Pre-tax earnings								117,000,000		$ 143,000,000
RUSSIAN FEDERATION
Business Acquisition [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		$ (162,000,000)						(162,000,000)
(Loss) on sale of business, net of tax		$ (174,000,000)
Disposal Group, Gain (loss) on disposal, net of tax, per diluted share | $ / shares		$ (0.29)
Percent of Consolidated Sales										1.50%
RUSSIAN FEDERATION | Other Nonoperating Income (Expense)
Business Acquisition [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		$ (130,000,000)
RUSSIAN FEDERATION | Operating Income (Loss)
Business Acquisition [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		(32,000,000)
RUSSIAN FEDERATION | Related restructuring
Business Acquisition [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		$ (9,000,000)
Backlog
Business Acquisition [Line Items]
Intangible assets, weighted average useful life		3 years
Open Systems International Inc. [Member]
Business Acquisition [Line Items]
Deferred revenue adjustment					3,000,000				11,000,000
Open Systems International Inc. [Member] | Backlog
Business Acquisition [Line Items]
Amortization of intangible assets					$ 7,000,000				$ 24,000,000
AspenTech
Business Acquisition [Line Items]
Cash contribution to AspenTech shareholders		$ 6,000,000,000
Business Acquisition, Percentage of Voting Interests Acquired													55.00%
Proceeds from Noncontrolling Interests		5,900,000,000
Adjustments to Additional Paid in Capital, Other		550,000,000
Approximate per share payout | $ / shares													$ 87.69
Cash and equivalents													$ 168,000,000
Net sales		173,000,000
Acquisition/divestiture costs		61,000,000						91,000,000
Goodwill													7,223,000,000
Intangibles													4,390,000,000
AspenTech | Other Nonoperating Income (Expense)
Business Acquisition [Line Items]
Amortization of intangible assets		32,000,000						32,000,000
AspenTech | Backlog
Business Acquisition [Line Items]
Intangibles													$ 310,000,000
Heritage AspenTech
Business Acquisition [Line Items]
Acquisition/divestiture costs		68,000,000
Automation Solutions [Member]
Business Acquisition [Line Items]
Goodwill		5,378,000,000						5,378,000,000		$ 5,508,000,000
Automation Solutions [Member] | Open Systems International Inc. [Member]
Business Acquisition [Line Items]
Purchase price of businesses, net of cash acquired	$ 1,600,000,000
Annualized sales										191,000,000
Goodwill	967,000,000
Goodwill expected tax deductible amount	0
Intangibles	$ 783,000,000
Intangible assets, weighted average useful life	11 years
Deferred tax liabilities	$ 193,000,000
Climate Technologies [Member]
Business Acquisition [Line Items]
Goodwill		$ 719,000,000						$ 719,000,000		$ 753,000,000
Forecast [Member]
Business Acquisition [Line Items]
Pretax periodic distribution from retained subordinated interest												$ 75,000,000
Forecast [Member] | InSinkErator [Member]
Business Acquisition [Line Items]
Purchase price											$ 3,000,000,000
Forecast [Member] | Minimum [Member]
Business Acquisition [Line Items]
Period over which distributions are expected to occur											2 years	2 years
Forecast [Member] | Maximum [Member]
Business Acquisition [Line Items]
Period over which distributions are expected to occur											3 years	3 years
Forecast [Member] | Micromine
Business Acquisition [Line Items]
Purchase price						$ 623,000,000	$ 900