Accounts Receivable (Tables)

3 Months Ended

Mar. 31, 2018

Accounts Receivable [Abstract]

Accounts Receivable

($ in millions)	March 31, 2018		December 31, 2017
Retail and wholesale	$	787	$	801
Other		90		87
Less: Allowance for doubtful accounts		(99)		(69)
Accounts receivable, net	$	778	$	819

Allowance For Doubtful Accounts

	For the three months ended March 31,
($ in millions)	2018		2017
Bad debt expense	$	19	$	32