Income Tax (Tables)

6 Months Ended

Mar. 31, 2021

Income Tax Disclosure [Abstract]

Effective Tax Rate

Effective Tax Rate

	Three Months Ended March 31						Six Months Ended March 31
	2021			2020			2021			2020
	(Dollars in millions)
(Provision) benefit for income taxes	$	(34	)	$	(10	)	$	(63	)	$	(14	)
Effective tax rate		29	%		81	%		29	%		22	%