Contingencies (Tables)

6 Months Ended

Mar. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Schedule of Environmental Reserves

The following are the components of the Superfund and non-Superfund environmental reserves (in millions):

	Superfund Sites		Non-Superfund Sites		Total
Beginning Balance at September 30, 2020	$	11	$	5	$	16
Payments and other	(2)		(1)		(3)
Accruals	1		—		1
Ending Balance at March 31, 2021	$	10	$	4	$	14