Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2019	Dec. 31, 2021	Sep. 30, 2021
Loss Contingencies [Line Items]
Accrued Environmental Loss Contingencies, Current		$ 64	$ 48
Accrued Environmental Loss Contingencies, Noncurrent		29	54
Accrual for Environmental Loss Contingencies, Total		93	102
Conditional asset retirement obligations		29	29
Total asbestos-related assets		388	378
Estimated asbestos related net liability on a discounted basis		65	80
Restricted Cash		15	6
Insurable liabilities, total		319	325
Insurance Settlements Receivable, Current		5	5
Insurance Settlements Receivable, Noncurrent		15	15
Total insurable receivables		20	20
Asbestos Issue [Member]
Loss Contingencies [Line Items]
Other current liabilities		58	58
Other noncurrent liabilities		395	400
Total asbestos-related liabilities		453	458
Restricted Cash		7	6
Restricted Investments		323	314
Total restricted assets		330	320
Insurance recoveries for asbestos-related liabilities		58	58
Other Current Liabilities
Loss Contingencies [Line Items]
Insurable liabilities		79	77
Accrued Compensation and Benefits [Member]
Loss Contingencies [Line Items]
Insurable liabilities		22	22
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Insurable liabilities		218	226
Other Current Assets
Loss Contingencies [Line Items]
Asbestos-related assets, current		15	13
Other Noncurrent Assets
Loss Contingencies [Line Items]
Asbestos-related assets, noncurrent		$ 373	$ 365
Stanton Street Facility, Marinette, WI [Member]
Loss Contingencies [Line Items]
Environmental Remediation Expense	$ 140