Income Tax (Tables)

6 Months Ended

Mar. 31, 2019

Income Tax Disclosure [Abstract]

Effective Tax Rate

Effective Tax Rate

	Three Months Ended March 31						Six Months Ended March 31
	2019			2018			2019			2018
	(Dollars in millions)
(Provision) benefit for income taxes	$	(20	)	$	7		$	(13	)	$	(198	)
Effective tax rate		41	%		4	%		11	%		(248	)%