Commitments and Contingencies - Schedule of Loss Contingencies by Contingency (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022
Loss Contingencies [Line Items]
Reserve for environmental liabilities, current	$ 48	$ 66
Reserve for environmental liabilities, noncurrent	227	220
Total reserves for environmental liabilities	275	286
Total asbestos-related liabilities	433	438
Total asbestos-related assets	306	300
Net asbestos-related liabilities	127	138
Restricted
Insurance receivables for asbestos-related liabilities	54	55
Total self-insured liabilities	364	341
Insurance receivables, current	10	10
Insurance receivables, noncurrent	20	20
Total insurance receivables	30	30
Asbestos Issue
Loss Contingencies [Line Items]
Total asbestos-related assets	252	245
Restricted
Cash	8	6
Investments	244	239
Other current liabilities
Loss Contingencies [Line Items]
Total asbestos-related liabilities	58	58
Restricted
Total self-insured liabilities	112	89
Other noncurrent liabilities
Loss Contingencies [Line Items]
Total asbestos-related liabilities	375	380
Restricted
Total self-insured liabilities	230	230
Other current assets
Loss Contingencies [Line Items]
Total asbestos-related assets	39	37
Other noncurrent assets
Loss Contingencies [Line Items]
Total asbestos-related assets	267	263
Accrued compensation and benefits
Restricted
Total self-insured liabilities	$ 22	$ 22