Investment And Other Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2019

Investment And Other Income (Loss) [Abstract]

Components Of Investment And Other Income

	For the three months ended
	March 31,
($ in millions)	2019		2018
Interest and dividend income	$	3	$	2
Pension and OPEB benefit (costs)		(11)		5
All other, net		(1)		1
Total investment and other income (loss), net	$	(9)	$	8