Employee Benefit Plans (Tables)

6 Months Ended

Mar. 31, 2021

Compensation And Retirement Disclosure [Abstract]

Net Periodic Defined Benefit Pension Costs

Net periodic defined benefit pension costs include the following:

	Three Months Ended March 31
	2021					2020
	Pension Benefits
	U.S.		Foreign			U.S.			Foreign
	(In millions)
Service cost	$	—	$	2		$	1		$	2
Interest cost		—		1			1			1
Expected return on plan assets		—		(3	)		(1	)		(3	)
Amortization of actuarial loss		—		—			—			—
Settlement charge		—		—			—			—
Net periodic benefit (credit) cost	$	—	$	—		$	1		$	—

	Six Months Ended March 31
	2021					2020
	Pension Benefits
	U.S.		Foreign			U.S.			Foreign
	(In millions)
Service cost	$	—	$	3		$	1		$	3
Interest cost		—		2			2			2
Expected return on plan assets		—		(5	)		(2	)		(5	)
Amortization of actuarial loss		—		1			—			1
Settlement charge		6		—			—			—
Net periodic benefit (credit) cost	$	6	$	1		$	1		$	1