Income Tax - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Taxes [Line Items]
Net discrete tax (benefits) expense related to tax settlements	$ 14		$ 1	$ (22)	$ 2
Tax expense related to withholding tax accruals on historic earnings due to changes in indefinite reinvestment assertion on certain entities				8
Uncertain tax positions from expirations of statute of limitations				$ 2	$ 1
United States Internal Revenue Service (IRS) [Member] | Earliest Tax Year [Member]
Income Taxes [Line Items]
Tax years remain subject to examination				2018
United States Internal Revenue Service (IRS) [Member] | Latest Tax Year [Member]
Income Taxes [Line Items]
Tax years remain subject to examination				2021
State Tax Authorities [Member] | Earliest Tax Year [Member]
Income Taxes [Line Items]
Tax years remain subject to examination				2005
State Tax Authorities [Member] | Latest Tax Year [Member]
Income Taxes [Line Items]
Tax years remain subject to examination				2021
Non-U.S. Jurisdictions [Member] | Earliest Tax Year [Member]
Income Taxes [Line Items]
Tax years remain subject to examination				2005
Non-U.S. Jurisdictions [Member] | Latest Tax Year [Member]
Income Taxes [Line Items]
Tax years remain subject to examination				2021
Purification Solutions [Member]
Income Taxes [Line Items]
Net discrete tax (benefits) expense related to tax settlements				$ (36)
Income tax benefit from tax loss related to divestiture		$ 183