Inventories, Net (Tables)

3 Months Ended

Mar. 31, 2013

Inventories

Inventories, net consisted of the following (in millions):

	March 31, 2013		December 31,   2012
Work-in-process, primarily related to long-term contracts and programs in progress		$    7,188		$    7,000
Less: customer advances and progress payments		(5,124)		(4,932)
		2,064		2,068
Other inventories		831		869
Total inventories, net		$    2,895		$    2,937