Acquisitions And Divestitures (Narrative) (Details) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended								5 Months Ended		12 Months Ended			27 Months Ended
	Oct. 01, 2020 USD ($)	Oct. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 AUD ($)	Sep. 30, 2022 USD ($) $ / shares	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2023 USD ($)	May 16, 2022 USD ($) $ / shares
Business Acquisition [Line Items]
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents			$ 1,804,000,000				$ 2,354,000,000						$ 1,804,000,000	$ 2,354,000,000	$ 3,315,000,000
Net sales			5,360,000,000	$ 5,005,000,000	$ 4,791,000,000	$ 4,473,000,000	4,947,000,000	$ 4,697,000,000	$ 4,431,000,000	$ 4,161,000,000			19,629,000,000	18,236,000,000	16,785,000,000
Acquisition/divestiture costs													110,000,000	0	0
Proceeds from issuance of debt													3,000,000,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal													486,000,000	0	0
Purchases of businesses, net of cash acquired													5,702,000,000	1,611,000,000	126,000,000
Goodwill			14,662,000,000				7,723,000,000						14,662,000,000	7,723,000,000	6,734,000,000
Deferred tax liabilities			2,157,000,000				1,198,000,000						2,157,000,000	1,198,000,000
Amortization of intangible assets													563,000,000	470,000,000	369,000,000
Proceeds from subordinated interest													438,000,000	0	0
Gain from periodic distribution from retained subordinated interest in Vertiv (VRT)													453,000,000	0	0
Net income (loss)													3,230,000,000	2,327,000,000	1,990,000,000
Restructuring expense													86,000,000	150,000,000	284,000,000
Intangible assets, net (excluding goodwill)			$ 6,724,000,000				$ 2,877,000,000						6,724,000,000	2,877,000,000
Earnings before income taxes													4,085,000,000	2,912,000,000	2,335,000,000
Gain from periodic distribution from retained subordinated interest in Vertiv (VRT), net of tax													$ 358,000,000
Gain from periodic distribution from retained subordinated interest in Vertiv (VRT), net of tax, per diluted share | $ / shares													$ (0.60)
AspenTech [Member]
Business Acquisition [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners																	45.00%
Acquisition-related Costs [Member]
Business Acquisition [Line Items]
Acquisition/divestiture costs														159,000,000
Interest Expense													$ 56,000,000	$ 147,000,000
Therm-O-Disc [Member]
Business Acquisition [Line Items]
Disposal Group, Gain (loss) on disposal, net of tax													$ 429,000,000
Disposal Group, Gain (loss) on disposal, net of tax, per diluted share | $ / shares													$ 0.72
InSinkErator [Member]
Business Acquisition [Line Items]
Disposal Group, including discountinued operation, revenue													$ 630,000,000
Disposal Group, Pre-tax earnings													152,000,000
RUSSIAN FEDERATION
Business Acquisition [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal													(181,000,000)
Disposal Group, Gain (loss) on disposal, net of tax													$ (190,000,000)
Disposal Group, Gain (loss) on disposal, net of tax, per diluted share | $ / shares													$ (0.32)
Percent of Consolidated Sales							1.50%							1.50%
RUSSIAN FEDERATION | Other Nonoperating Income (Expense) [Member]
Business Acquisition [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal													$ (145,000,000)
RUSSIAN FEDERATION | Operating Income (Loss) [Member]
Business Acquisition [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal													(36,000,000)
RUSSIAN FEDERATION | Related restructuring [Member]
Business Acquisition [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal													(10,000,000)
Backlog
Business Acquisition [Line Items]
Intangible assets, weighted average useful life			3 years
Open Systems International, Inc. [Member]
Business Acquisition [Line Items]
Acquisition/divestiture costs														$ 6,000,000
Deferred Revenue Adjustment														14,000,000
Open Systems International, Inc. [Member] | Backlog
Business Acquisition [Line Items]
Amortization of intangible assets														30,000,000
AspenTech [Member]
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, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents																	$ 168,000,000
Net sales													356,000,000
Acquisition/divestiture costs													91,000,000
Goodwill																	7,225,000,000
Goodwill, expected tax deductible amount																	34,000,000
Intangibles																	4,390,000,000
AspenTech [Member] | Other Nonoperating Income (Expense) [Member]
Business Acquisition [Line Items]
Amortization of intangible assets													97,000,000
AspenTech [Member] | Backlog
Business Acquisition [Line Items]
Intangibles																	$ 310,000,000
Heritage AspenTech [Member]
Business Acquisition [Line Items]
Acquisition/divestiture costs			68,000,000
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Purchases of businesses, net of cash acquired													130,000,000		126,000,000
Annualized sales													$ 40,000,000		$ 50,000,000
Number of businesses acquired													3		3
Automation Solutions [Member]
Business Acquisition [Line Items]
Goodwill			5,256,000,000				$ 5,508,000,000						$ 5,256,000,000	5,508,000,000	$ 5,506,000,000
Restructuring expense													$ 52,000,000	121,000,000	$ 225,000,000
Automation Solutions [Member] | Open Systems International, Inc. [Member]
Business Acquisition [Line Items]
Purchases 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
Automation Solutions [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Number of businesses acquired													2		2
Climate Technologies [Member]
Business Acquisition [Line Items]
Goodwill			715,000,000				753,000,000						$ 715,000,000	753,000,000	$ 730,000,000
Restructuring expense													10,000,000	15,000,000	$ 23,000,000
Climate Technologies [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Number of businesses acquired															1
AspenTech [Member]
Business Acquisition [Line Items]
Goodwill			$ 8,326,000,000				$ 1,044,000,000						8,326,000,000	1,044,000,000	$ 77,000,000
Restructuring expense													$ 0	$ 2,000,000	$ 7,000,000
AspenTech [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Number of businesses acquired													1
Scenario, Forecast [Member]
Business Acquisition [Line Items]
Pretax periodic distribution from retained subordinated interest in Vertiv (VRT)																$ 75,000,000
Scenario, Forecast [Member] | InSinkErator [Member]
Business Acquisition [Line Items]
Purchase price		$ 3,000,000,000
Scenario, Forecast [Member] | Minimum [Member]
Business Acquisition [Line Items]
Period over which distributions are expected to occur																2 years
Scenario, Forecast [Member] | Maximum [Member]
Business Acquisition [Line Items]
Period over which distributions are expected to occur																3 years
Scenario, Forecast [Member] | Micromine [Member]
Business Acquisition [Line Items]
Purchase price											$ 623,000,000	$ 900