Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2020

Accounts Receivable [Abstract]

Accounts Receivable

($ in millions)	2020		2019
Retail and Wholesale	$	608	$	678
Other		75		71
Less: Allowance for doubtful accounts		(130)		(120)
Accounts receivable, net	$	553	$	629

Schedule Of Allowance For Doubtful Accounts

							Decreases:		Reclassified
	Balance at		ASC 606		Increases:		Write-offs		to		Balance at
	beginning of		Transition		Charged to		and Customer		Assets Held		end of
($ in millions)	the Period		Adjustment		Revenue		Credits		for Sale		the Period
2018	$	69	$	32	$	93	$	(89)	$	-	$	105
2019	$	105	$	-	$	109	$	(83)	$	(11)	$	120
2020	$	120	$	-	$	106	$	(96)	$	-	$	130