Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2012

Accounts Receivable

Schedule of the entity's accounts receivable balances

	Successor
	December 31, 2012			December 31, 2011(1)
	(Dollars in millions)
Trade and purchased receivables	$	661			660
Earned and unbilled receivables		82			81
Other		12			8
Total accounts receivable		755			749
Less: allowance for doubtful accounts		(46	)		(42	)
Accounts receivable, less allowance	$	709			707

(1)

We have reclassified prior period amounts of purchased receivables from other to trade and purchased receivables to conform to the current period presentation.

Schedule of the entity's allowance for doubtful accounts

	Allowance for Doubtful Accounts
	(Dollars in millions)
Balance at January 1, 2010 (Predecessor)	$	53
Charged to expense—net		70
Deductions		(75	)
Balance at December 31, 2010 (Predecessor)		48
Charged to expense—net		17
Deductions		(18	)
Balance at March 31, 2011(Predecessor)	$	47
Fair value adjustment		(47	)
Balance at April 1, 2011 (Successor)	$	—
Charged to expense—net		44
Deductions		(2	)
Balance at December 31, 2011 (Successor)		42
Charged to expense—net		74
Deductions		(70	)
Balance at December 31, 2012 (Successor)	$	46