Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 2,279	$ 1,704	$ 3,264	$ 4,150
Currency translation adjustments	(10)	(35)	(3)	(79)
Unrealized gain on certain investments, net of tax of ($1), ($5), ($2), and ($2)	2	1	1	5
Unrealized (loss)/gain on derivative instruments [Abstract]
Unrealized gain/(loss) arising during period, net of tax of ($30), $78, ($7), and $41	13	(73)	54	(139)
Reclassification adjustment for losses included in net earnings, net of tax of ($32), ($28), ($8), and ($12)	15	24	58	52
Total unrealized gain/(loss) on derivative instruments, net of tax	28	(49)	112	(87)
Defined benefit pension plans & other postretirement benefits [Abstract]
Amortization of prior service (benefit)/cost included in net periodic pension cost, net of tax of $23, ($16), $8, and ($5)	(15)	10	(42)	29
Net actuarial (loss)/gain arising during the period, net of tax of $215, ($2), $0, and $15	(1)	(27)	(388)	4
Amortization of actuarial losses included in net periodic pension cost, net of tax of ($217), ($425), ($72), and ($143)	(131)	(257)	(392)	(765)
Settlements and curtailments included in net income, net of tax of ($7), ($2), $0, and $0			(14)	(3)
Pension and postretirement cost related to our equity method investments, net of tax of ($2), $0, ($1), and $0	2		4
Total defined benefit pension plans and other postretirement benefits, net of tax	117	240	(20)	801
Other comprehensive income, net of tax	137	157	90	640
Comprehensive loss related to noncontrolling interests	(1)	(1)	(1)	(2)
Comprehensive income, net of tax	$ 2,415	$ 1,860	$ 3,353	$ 4,788