Investment And Other Income (Tables)

3 Months Ended

Mar. 31, 2018

Investment And Other Income [Abstract]

Components Of Investment And Other Income

	For the three months ended
	March 31,
($ in millions)	2018		2017
Interest and dividend income	$	2	$	3
Pension and OPEB costs		5		(3)
All other, net		1		-
Total investment and other income, net	$	8	$	-