Accounts Receivable, Net

12 Months Ended

Dec. 31, 2012

Receivables [Abstract]

Accounts Receivable, Net

ACCOUNTS RECEIVABLE, NET

Unbilled amounts represent sales for which billings have not been presented to customers by period-end. These amounts are usually billed and collected within one year. Progress payments are received on a number of fixed-priced contracts. Unbilled amounts are presented net of progress payments of $5.0 billion and $6.4 billion at December 31, 2012, and 2011, respectively.

Substantially all accounts receivable at December 31, 2012, are expected to be collected in 2013.

The company does not believe it has significant exposure to credit risk as accounts receivable and the related unbilled amounts are primarily from contracts where the U.S. Government is the primary customer.

Accounts receivable consisted of the following:

	December 31
$ in millions	2012			2011
Due on U.S. Government contracts
Amounts billed		$ 794			$ 812
Recoverable costs and accrued profit on progress completed - unbilled	1,396			1,594
	2,190			2,406
Due on non-U.S. Government contracts
Amounts billed	314			249
Recoverable costs and accrued profit on progress completed - unbilled	414			363
	728			612
Total accounts receivable	2,918			3,018
Allowance for doubtful accounts	(60		)	(54		)
Total accounts receivable, net		$2,858			$2,964