Severance (Tables)

12 Months Ended

Dec. 31, 2015

Restructuring and Related Activities [Abstract]

Schedule of changes in accrued liability for severance expenses

Changes in our accrued liability for severance expenses were as follows:

	Severance
	(Dollars in millions)
Balance at December 31, 2013	$	5
Accrued to expense	44
Payments, net	(39		)
Balance at December 31, 2014	$	10
Accrued to expense	51
Payments, net	(55		)
Balance at December 31, 2015	$	6