Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2012

Accounts Receivable

Schedule of components of accounts receivable

	December 31,
	2012			2011(1)
	(Dollars in millions)
Trade and purchased receivables	$	1,782			1,768
Earned and unbilled receivables		274			296
Other		19			31
Total accounts receivable		2,075			2,095
Less: allowance for doubtful accounts		(158	)		(145	)
Accounts receivable, less allowance	$	1,917			1,950

(1)

We have reclassified prior period amounts to conform to the current period presentation.

Schedule of details of allowance for doubtful accounts

	Beginning Balance		Additions		Deductions			Other		Ending Balance
	(Dollars in millions)
2012	$	145		187		(174	)		—		158
2011	$	60		153		(68	)		—		145
2010	$	48		91		(79	)		—		60