Income Taxes (Tables)

9 Months Ended

Sep. 30, 2018

Income Tax Disclosure [Abstract]

Income Tax Allocation

Income Tax Allocation
	Three Months Ended September 30,					Nine Months Ended September 30,
(Dollars in millions)	2018		2017			2018			2017
Loss before income taxes	$	—	$	(484	)	$	(28	)	$	(2,345	)
Income tax benefit/(provision)	$	111	$	45		$	134		$	(34	)
Effective tax rate	*		9.3		%	478.6		%	(1.4		)%