Contracts in Process (Tables)

12 Months Ended

Dec. 31, 2011

Contracts in Process [Abstract]

Components of contracts in process

	December 31,
	2011			2010
	(in millions)
Unbilled contract receivables, gross	$	2,926		$	2,769
Unliquidated progress payments		(1,146	)		(1,007	)
Unbilled contract receivables, net		1,780			1,762
Inventoried contract costs, gross		928			882
Unliquidated progress payments		(79	)		(96	)
Inventoried contract costs, net		849			786
Total contracts in process	$	2,629		$	2,548

General & Administrative, Independent Research & Development and Bid and Proposal Costs

	Year Ended December 31,
	2011			2010			2009
	(in millions)
Amounts included in inventoried contract costs at beginning of the year	$	97		$	77		$	74
Add: IRAD and B&P costs incurred		348			344			324
Other G&A costs incurred		963			987			990
Total contract costs incurred		1,311			1,331			1,314
Less: Amounts charged to cost of sales		(1,317	)		(1,311	)		(1,311	)
Amounts included in inventoried contract costs at end of the year	$	91		$	97		$	77

Selling, general and administrative expenses and research and development expenses

	Year Ended December 31,
	2011		2010		2009
	(in millions)
Selling, general and administrative expenses	$	298	$	279	$	250
Research and development expenses		73		68		59
Total	$	371	$	347	$	309