Company Restructuring (Tables)

3 Months Ended

Mar. 31, 2020

Restructuring and Related Activities [Abstract]

Schedule of changes in the restructuring liability

Restructuring activity during the period
($ in millions)	Employee costs			Exit costs			Total liability
Restructuring liability as of December 31, 2019	$	14		$	8		$	22
Expense incurred	2			1			3
Adjustments to liability	2			—			2
Payments	(4		)	(2		)	(6		)
Restructuring liability as of March 31, 2020	$	14		$	7		$	21