Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2015

Accounts Receivable [Abstract]

Accounts Receivable

($ in millions)	2015		2014
Retail and Wholesale	$	569	$	630
Other		59		56
Less: Allowance for doubtful accounts		(57)		(72)
Accounts receivable, net	$	571	$	614

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
2013	$	93	$	69	$	(3)	$	(88)	$	71
2014	$	71	$	61	$	-	$	(60)	$	72
2015	$	72	$	67	$	(17)	$	(65)	$	57