Commitments and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Loss Contingencies [Line Items]
Raw material purchased	$ 512,000,000	$ 405,000,000	$ 258,000,000
Long term purchase commitment related to information technology	$ 26,000,000
Purchase agreement period	5 years
Charges for environmental expense	$ 1,000,000		$ 1,000,000
Environmental Remediation Expense, Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of sales	Cost of sales	Cost of sales
Settlement amount	$ 11,000,000	$ 37,000,000	$ 37,000,000
(Provision) benefit for income taxes	(102,000,000)	(123,000,000)	(191,000,000)
Respirator Liabilities [Member]
Loss Contingencies [Line Items]
Respirator reserve	$ 39,000,000	44,000,000
Respirator reserve period	10 years
Respirator Liabilities [Member] | Selling and Administrative Expenses [Member]
Loss Contingencies [Line Items]
Respirator charge	$ 6,000,000
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	4,000,000	5,000,000
Reserve for environmental matters included in accrued expenses	$ 1,000,000	$ 1,000,000
Environmental Loss Contingency, Current, Statement of Financial Position [Extensible Enumeration]	Accounts payable and accrued liabilities	Accounts payable and accrued liabilities
Reserve for environmental matters included in other liabilities	$ 3,000,000	$ 4,000,000
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Cash payments for environmental reserves	$ 2,000,000	$ 2,000,000	7,000,000
Environmental Matters [Member] | Operating and Maintenance Component [Member]
Loss Contingencies [Line Items]
Reserved for environmental matters	3,000,000	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	275,000
Charges for environmental expense		1,000,000
Charges related to value added tax matters	41,000,000
Non-Controlling Interests [Member]
Loss Contingencies [Line Items]
Raw material purchased	235,000,000	135,000,000	$ 81,000,000
Accounts payable and accrued liabilities	$ 31,000,000	$ 14,000,000