Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net earnings	$ 6,920	$ 5,732	$ 6,315
Postretirement benefit plans
Net actuarial (loss) gain recognized due to plan remeasurements, net of tax of $181 million in 2023, $518 million in 2022 and $925 million in 2021	(689)	1,873	3,404
Amortization of actuarial losses and prior service credits, net of tax of $40 million in 2023, $18 million in 2022 and $130 million in 2021	(149)	69	477
Pension settlement charge, net of tax of $314 million in 2022 and $355 million in 2021	0	1,156	1,310
Other, net, net of tax of $6 million in 2023, $2 million in 2022 and $11 million in 2021	58	(115)	(76)
Other comprehensive income, net of tax	(780)	2,983	5,115
Comprehensive income	$ 6,140	$ 8,715	$ 11,430