Income Tax (Tables)

6 Months Ended

Mar. 31, 2022

Income Tax Disclosure [Abstract]

Effective Tax Rate

Effective Tax Rate

	Three Months Ended March 31						Six Months Ended March 31
	2022			2021			2022			2021
	(Dollars in millions)
(Provision) benefit for income taxes	$	(36	)	$	(34	)	$	(24	)	$	(63	)
Effective tax rate		24	%		29	%		44	%		29	%