Commitments and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Loss Contingencies [Line Items]
Raw material purchased	$ 405,000,000	$ 258,000,000	$ 466,000,000
Long term purchase commitment related to information technology	$ 7,000,000
Purchase agreement period	5 years
Charges for environmental expense		1,000,000	1,000,000
Settlement amount	$ 37,000,000	37,000,000	10,000,000
(Provision) benefit for income taxes	(123,000,000)	(191,000,000)	(70,000,000)
Respirator Liabilities [Member]
Loss Contingencies [Line Items]
Respirator reserve	$ 44,000,000	24,000,000
Respirator reserve period	10 years
Respirator Liabilities [Member] | February 2020 Settlement Agreement [Member]
Loss Contingencies [Line Items]
Respirator liability		65,200,000
Respirator Liabilities [Member] | Selling and Administrative Expenses [Member]
Loss Contingencies [Line Items]
Respirator charge	$ 25,000,000
Respirator Liabilities [Member] | Selling and Administrative Expenses [Member]
Loss Contingencies [Line Items]
Respirator charge		53,000,000	20,000,000
Respirator Liabilities [Member] | Selling and Administrative Expenses [Member] | February 2020 Settlement Agreement [Member]
Loss Contingencies [Line Items]
Respirator charge		50,000,000
Brazil Indirect Tax Settlements
Loss Contingencies [Line Items]
(Provision) benefit for income taxes	12,000,000
Brazil Indirect Tax Settlements | Net Sales And Other Operating Revenues
Loss Contingencies [Line Items]
Income tax credit recovery	9,000,000
Brazil Indirect Tax Settlements | Other Nonoperating Income (Expense) [Member]
Loss Contingencies [Line Items]
Estimated charge for damages	3,000,000
Environmental Matters [Member]
Loss Contingencies [Line Items]
Reserved for environmental matters	5,000,000	7,000,000
Reserve for environmental matters included in accrued expenses	1,000,000	3,000,000
Reserve for environmental matters included in other liabilities	4,000,000	4,000,000
Cash payments for environmental reserves	2,000,000	7,000,000	2,000,000
Environmental Matters [Member] | Operating and Maintenance Component [Member]
Loss Contingencies [Line Items]
Reserved for environmental matters	4,000,000	4,000,000
Per Accident for Auto [Member]
Loss Contingencies [Line Items]
Self-insured liability	500,000
Per Occurrence for All Other [Member]
Loss Contingencies [Line Items]
Self-insured liability	2,000,000
Per Accident for U.S. Workers' Compensation [Member]
Loss Contingencies [Line Items]
Self-insured liability	1,000,000
Maximum [Member]
Loss Contingencies [Line Items]
Retention for medical costs per person per annum	250,000
Charges for environmental expense	1,000,000
Charges related to value added tax matters	37,000,000
Non-Controlling Interests [Member]
Loss Contingencies [Line Items]
Raw material purchased	135,000,000	81,000,000	$ 156,000,000
Accounts payable and accrued liabilities	$ 14,000,000	$ 12,000,000