Discontinued Operations and Disposal Groups (Details) - USD ($)		3 Months Ended			6 Months Ended	9 Months Ended
	May 31, 2023	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2022
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Disposal Group, Including Discontinued Operation, Revenue		$ 847,000,000		$ 1,540,000,000		$ 3,205,000,000	$ 4,357,000,000
Disposal Group, Including Discontinued Operation, Costs of Goods Sold		516,000,000		1,029,000,000		2,029,000,000	2,963,000,000
Disposal Group, Including Discontinued Operation, General and Administrative Expense		122,000,000		158,000,000		399,000,000	481,000,000
Gain (loss) on sale of business		(10,576,000,000)		0		(13,359,000,000)	0
Disposal Group, Including Discontinued Operations, Other (income) deductions, net		8,000,000		(464,000,000)		87,000,000	(439,000,000)
Earnings before income taxes		10,777,000,000		817,000,000		14,049,000,000	1,352,000,000
Discontinued operations taxes		2,014,000,000		120,000,000		3,019,000,000	260,000,000
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax		8,763,000,000		697,000,000		11,030,000,000	1,092,000,000
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net		0			$ 0	0		$ 815,000,000
Disposal Group, Including Discontinued Operation, Inventory, Current		0			0	0		530,000,000
Disposal Group, Including Discontinued Operation, Other Assets, Current		0			0	0		53,000,000
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Current		0			0	0		1,263,000,000
Disposal Group, Including Discontinued Operation, Goodwill, Current		0			0	0		718,000,000
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		0			0	0		277,000,000
Disposal Group, Including Discontinued Operation, Assets		0			0	0		3,656,000,000
Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities, Current [Abstract]		0			0	0		812,000,000
Disposal Group, Including Discontinued Operation, Other Liabilities, Current		0			0	0		536,000,000
Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent		0			0	0		167,000,000
Disposal Group, Including Discontinued Operation, Liabilities		$ 0			$ 0	0		1,515,000,000
Cash Provided by (Used in) Operating Activities, Discontinued Operations
Cash Provided by (Used in) Operating Activities, Discontinued Operations						(439,000,000)	470,000,000
Cash Provided by (Used in) Investing Activities, Discontinued Operations						12,485,000,000	439,000,000
Income taxes paid related to gain on divestitures, subsidiary restructurings and transaction fees						$ 750,000,000
Climate Technologies (excluding Therm-O-Disc)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncontrolling interest, ownership percentage by parent		40.00%			40.00%	40.00%
InSinkErator [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price						$ 3,000,000,000.0
Disposal Group, Pre-tax earnings			$ 152,000,000
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax						2,800,000,000
(Loss) on sale of business, net of tax						2,100,000,000
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Disposal Group, Including Discontinued Operation, Revenue			630,000,000
Discontinued Operation, Tax Effect of Discontinued Operation						660,000,000
Climate Technologies (excluding Therm-O-Disc)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture	$ 9,700,000,000				$ 9,700,000,000
Purchase price					14,000,000,000.0	9,700,000,000
Proceeds from notes receivable					2,250,000,000
Disposal Group, Pre-tax earnings			1,000,000,000.0
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax		$ 10,600,000,000
(Loss) on sale of business, net of tax		8,400,000,000
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Disposal Group, Including Discontinued Operation, Revenue		847,000,000	5,000,000,000.0	1,325,000,000		3,156,000,000	3,659,000,000
Disposal Group, Including Discontinued Operation, Costs of Goods Sold		516,000,000		892,000,000		2,000,000,000	2,520,000,000
Disposal Group, Including Discontinued Operation, General and Administrative Expense		122,000,000		129,000,000		391,000,000	383,000,000
Gain (loss) on sale of business		(10,576,000,000)		0		(10,576,000,000)	0
Disposal Group, Including Discontinued Operations, Other (income) deductions, net		8,000,000		14,000,000		75,000,000	26,000,000
Earnings before income taxes		10,777,000,000		290,000,000		11,266,000,000	730,000,000
Discontinued operations taxes		2,014,000,000		63,000,000		2,366,000,000	158,000,000
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax		8,763,000,000		227,000,000		8,900,000,000	572,000,000
Ceased Depreciation		26,000,000				96,000,000
Discontinued operations costs						57,000,000
Discontinued Operation, Tax Effect of Discontinued Operation						2,200,000,000
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net		0			0	0		747,000,000
Disposal Group, Including Discontinued Operation, Inventory, Current		0			0	0		449,000,000
Disposal Group, Including Discontinued Operation, Other Assets, Current		0			0	0		49,000,000
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Current		0			0	0		1,122,000,000
Disposal Group, Including Discontinued Operation, Goodwill, Current		0			0	0		716,000,000
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		0			0	0		265,000,000
Disposal Group, Including Discontinued Operation, Assets		0			0	0		3,348,000,000
Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities, Current [Abstract]		0			0	0		752,000,000
Disposal Group, Including Discontinued Operation, Other Liabilities, Current		0			0	0		475,000,000
Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent		0			0	0		154,000,000
Disposal Group, Including Discontinued Operation, Liabilities		0			$ 0	0		1,381,000,000
Cash Provided by (Used in) Operating Activities, Discontinued Operations
Cash Provided by (Used in) Operating Activities, Discontinued Operations						156,000,000	486,000,000
Cash Provided by (Used in) Investing Activities, Discontinued Operations						$ 9,430,000,000	(112,000,000)
Increase in cash proceeds for additional ownership interest		$ 200,000,000
Increase in ownership percentage		5.00%			5.00%	5.00%
Interest accrual percentage on note payable		5.00%			5.00%	5.00%
Ownership percentage at time of announcement		45.00%			45.00%	45.00%
Therm-O-Disc
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax			486,000,000
(Loss) on sale of business, net of tax			$ 429,000,000
Therm-O-Disc &/or InSinkErator
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Disposal Group, Including Discontinued Operation, Revenue		$ 0		215,000,000		$ 49,000,000	698,000,000
Disposal Group, Including Discontinued Operation, Costs of Goods Sold		0		137,000,000		29,000,000	443,000,000
Disposal Group, Including Discontinued Operation, General and Administrative Expense		0		29,000,000		8,000,000	98,000,000
Gain (loss) on sale of business		0		0		(2,783,000,000)	0
Disposal Group, Including Discontinued Operations, Other (income) deductions, net		0		(478,000,000)		12,000,000	(465,000,000)
Earnings before income taxes		0		527,000,000		2,783,000,000	622,000,000
Discontinued operations taxes		0		57,000,000		653,000,000	102,000,000
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax		0		$ 470,000,000		2,130,000,000	520,000,000
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net		0			$ 0	0		68,000,000
Disposal Group, Including Discontinued Operation, Inventory, Current		0			0	0		81,000,000
Disposal Group, Including Discontinued Operation, Other Assets, Current		0			0	0		4,000,000
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Current		0			0	0		141,000,000
Disposal Group, Including Discontinued Operation, Goodwill, Current		0			0	0		2,000,000
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent		0			0	0		12,000,000
Disposal Group, Including Discontinued Operation, Assets		0			0	0		308,000,000
Disposal Group, Including Discontinued Operation, Accounts Payable and Accrued Liabilities, Current [Abstract]		0			0	0		60,000,000
Disposal Group, Including Discontinued Operation, Other Liabilities, Current		0			0	0		61,000,000
Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent		0			0	0		13,000,000
Disposal Group, Including Discontinued Operation, Liabilities		$ 0			$ 0	0		$ 134,000,000
Cash Provided by (Used in) Operating Activities, Discontinued Operations
Cash Provided by (Used in) Operating Activities, Discontinued Operations						(595,000,000)	(16,000,000)
Cash Provided by (Used in) Investing Activities, Discontinued Operations						$ 3,055,000,000	$ 551,000,000