Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	[1]	Dec. 31, 2018	[1]
Statement of Comprehensive Income [Abstract]
Net earnings	$ 3,167	$ 3,484		$ 3,345
Gains on cash flow hedges	366	97		36
Foreign currency translation adjustments	353	186		(300)
Change in retirement plans’ funded status	(453)	(857)		(45)
Other comprehensive income (loss), pretax	266	(574)		(309)
Benefit for income tax, net	2	156		1
Other comprehensive income (loss), net of tax	268	(418)	[2]	(308)	[2]
Comprehensive income	$ 3,435	$ 3,066		$ 3,037

[1] *Prior-period information has been restated for the retrospective application of a change in accounting principle related to the amortization of actuarial gains and losses for our qualified U.S. government pension plans, which we adopted in the fourth quarter of 2020. For further discussion of this change in accounting principle, see Note T to the Consolidated Financial Statements.

[2] Prior-period information has been restated for the retrospective application of a change in accounting principle related to the amortization of actuarial gains and losses for our qualified U.S. government pension plans, which we adopted in the fourth quarter of 2020. For further discussion of this change in accounting principle, see Note T to the Consolidated Financial Statements.