Income Tax (Tables)

9 Months Ended

Jun. 30, 2020

Income Tax Disclosure [Abstract]

Effective Tax Rate

Effective Tax Rate

	Three Months Ended June 30						Nine Months Ended June 30
	2020			2019			2020			2019
	(Dollars in millions)
(Provision) benefit for income taxes	$	5		$	(30	)	$	(9	)	$	(43	)
Effective tax rate		51	%		43	%		17	%		23	%