Income Tax (Tables)

9 Months Ended

Jun. 30, 2018

Income Tax Disclosure [Abstract]

Effective Tax Rate

Effective Tax Rate

	Three Months Ended June 30						Nine Months Ended June 30
	2018			2017			2018			2017
	(Dollars in millions)
(Provision) benefit for income taxes	$	4		$	(16	)	$	(194	)	$	(33	)
Effective tax rate		(3	)%		23	%		1202	%		14	%