Investment And Other Income (Loss), Net (Tables)

12 Months Ended

Dec. 31, 2020

Investment And Other Income (Loss), Net [Abstract]

Components Of Investment And Other Income (Loss), Net

	For the year ended December 31,
($ in millions)	2020		2019		2018
Interest and dividend income	$	4	$	9	$	6
Pension and OPEB benefit (costs)		(43)		(42)		10
All other, net		(4)		(4)		(3)
Total investment and other income (loss), net	$	(43)	$	(37)	$	13