Investment And Other Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2020

Investment And Other Income (Loss) [Abstract]

Components Of Investment And Other Income

	For the three months ended
	March 31,
($ in millions)	2020		2019
Interest and dividend income	$	2	$	3
Pension and OPEB benefit (costs)		1		(11)
All other, net		2		(1)
Total investment and other income (loss), net	$	5	$	(9)