Restructuring Costs (Tables)

3 Months Ended

Dec. 31, 2021

Restructuring and Related Activities [Abstract]

Schedule of Changes in Restructuring Reserves

The changes in restructuring reserves for the three months ended December 31, 2021 and 2020 are as follows (in millions):

	Employee Termination Benefits		Plant  Shutdown  & Other		Total
Balance at September 30, 2021	$	5	$	1	$	6
Activity during the period:
Charges	1		3		4
Cash payments	(4)		—		(4)
Other	—		(1)		(1)
Total restructuring reserves at December 31, 2021	2		3		5
Less: non-current restructuring reserves	(1)		—		(1)
Restructuring reserves – current, at December 31, 2021	$	1	$	3	$	4
Balance at September 30, 2020	$	10	$	—	$	10
Activity during the period:
Charges	5		1		6
Cash payments	(4)		—		(4)
Other	(1)		(1)		(2)
Total restructuring reserves at December 31, 2020	10		—		10
Less: non-current restructuring reserves	—		—		—
Restructuring reserves – current, at December 31, 2020	$	10	$	—	$	10