Income Tax (Tables)

9 Months Ended

Jun. 30, 2021

Income Tax Disclosure [Abstract]

Effective Tax Rate

Effective Tax Rate

	Three Months Ended June 30						Nine Months Ended June 30
	2021			2020			2021			2020
	(Dollars in millions)
(Provision) benefit for income taxes	$	(30	)	$	5		$	(93	)	$	(9	)
Effective tax rate		24	%		51	%		27	%		17	%