Consolidated Statements of Earnings and Comprehensive Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues	$ 36,799	$ 33,841	$ 30,095
Operating costs and expenses
General and administrative expenses	3,413	3,290	3,011
Operating income	4,065	3,969	3,780
Other (expense) income
Interest expense	(593)	(528)	(562)
FAS (non-service) pension benefit	1,198	800	1,049
Mark-to-market pension and OPB expense	(1,034)	(1,800)	(655)
Other, net	92	107	130
Earnings before income taxes	3,728	2,548	3,742
Federal and foreign income tax expense	539	300	513
Net earnings	$ 3,189	$ 2,248	$ 3,229
Basic earnings per share
Basic earnings per share	$ 19.08	$ 13.28	$ 18.59
Weighted-average common shares outstanding, in millions	167.1	169.3	173.7
Diluted earnings per share
Diluted earnings per share	$ 19.03	$ 13.22	$ 18.49
Weighted-average diluted shares outstanding, in millions	167.6	170.0	174.6
Net earnings (from above)	$ 3,189	$ 2,248	$ 3,229
Other comprehensive loss
Change in unamortized prior service credit, net of tax expense of $14 in 2020, $15 in 2019 and $19 in 2018	(41)	(47)	(60)
Change in cumulative translation adjustment and other, net	10	2	(14)
Other comprehensive loss, net of tax	(31)	(45)	(74)
Comprehensive income	3,158	2,203	3,155
Product [Member]
Cost of Goods and Services Sold	21,559	18,675	15,785
Revenues	27,015	23,852	20,469
Service [Member]
Cost of Goods and Services Sold	7,762	7,907	7,519
Revenues	$ 9,784	$ 9,989	$ 9,626