Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and equivalents	$ 3,296	$ 2,649
Accounts receivable	4,204	4,429
Contracts in process	4,964	5,168
Inventories	2,776	2,310
Other current assets	504	812
Total current assets	15,744	15,368
Noncurrent assets:
Property, plant and equipment, net	3,403	3,284
Intangible assets, net	1,383	1,813
Goodwill	12,048	13,576
Other assets	1,731	842
Total noncurrent assets	18,565	19,515
Total assets	34,309	34,883
Current liabilities:
Accounts payable	2,469	2,895
Customer advances and deposits	6,042	5,011
Other current liabilities	3,109	3,239
Total current liabilities	11,620	11,145
Noncurrent liabilities:
Long-term debt	3,908	3,907
Other liabilities	7,391	6,599
Commitments and contingencies (See Note N)
Total noncurrent liabilities	11,299	10,506
Shareholders’ equity:
Common stock	482	482
Surplus	1,988	1,888
Retained earnings	17,860	18,917
Treasury stock	(6,165)	(5,743)
Accumulated other comprehensive loss	(2,775)	(2,312)
Total shareholders’ equity	11,390	13,232
Total liabilities and shareholders’ equity	$ 34,309	$ 34,883