Condensed Consolidated Statements of Earnings and Comprehensive Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Sales
Product	$ 3,330	$ 3,487	$ 10,344	$ 10,227
Service	2,776	2,783	8,160	8,515
Total sales	6,106	6,270	18,504	18,742
Operating costs and expenses
Product	2,499	2,629	7,833	7,760
Service	2,262	2,333	6,621	6,963
General and administrative expenses	555	572	1,695	1,713
Operating income	790	736	2,355	2,306
Other (expense) income
Interest expense	(70)	(53)	(183)	(158)
Other, net	0	12	(16)	30
Earnings before income taxes	720	695	2,156	2,178
Federal and foreign income tax expense	223	236	682	733
Net earnings	497	459	1,474	1,445
Basic earnings per share
Basic earnings per share (in dollars per share)	$ 2.18	$ 1.86	$ 6.33	$ 5.77
Weighted-average common shares outstanding, in millions (shares)	228.2	247.2	232.8	250.4
Diluted earnings per share
Diluted earnings per share (in dollars per share)	$ 2.14	$ 1.82	$ 6.22	$ 5.67
Weighted-average diluted shares outstanding, in millions (shares)	232.6	252.1	237.0	255.0
Net earnings (from above)	497	459	1,474	1,445
Other comprehensive income
Change in unamortized benefit plan costs, net of tax	78	50	237	154
Change in cumulative translation adjustment	15	12	8	3
Change in unrealized loss on marketable securities and cash flow hedges, net of tax	(1)	(1)	(1)	(1)
Other comprehensive income, net of tax	92	61	244	156
Comprehensive income	$ 589	$ 520	$ 1,718	$ 1,601