Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2016

Accounts Receivable [Abstract]

Accounts Receivable

($ in millions)	2016		2015
Retail and Wholesale	$	979	$	569
Other		90		59
Less: Allowance for doubtful accounts		(131)		(57)
Accounts receivable, net	$	938	$	571

Allowance For Doubtful Accounts

($ in millions)	Balance at beginning of Period		Charged to Other Revenue		Charged (Credited) to Switched and Nonswitched Revenue and Other Accounts		Write-offs, net of Recoveries		Balance at end of Period
2014	$	71	$	61	$	-	$	(60)	$	72
2015	$	72	$	67	$	(17)	$	(65)	$	57
2016	$	57	$	164	$	15	$	(105)	$	131