Company Restructuring (Tables)

3 Months Ended

Mar. 31, 2017

Restructuring and Related Activities [Abstract]

Schedule of changes in the restructuring liability

The following table presents changes in the restructuring liability during the three months ended March 31, 2017.

($ in millions)	Employee costs		Exit costs			Total liability
Balance as of December 31, 2016	$	—	$	2		$	2
Expense incurred	3		2			5
Payments applied against liability	—		(3		)	(3		)
Balance as of March 31, 2017	$	3	$	1		$	4