Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net earnings	$ 5,732	$ 6,315	$ 6,833
Postretirement benefit plans
Net actuarial gain (loss) recognized due to plan remeasurements, net of tax of $518 million in 2022, $925 million in 2021 and $292 million in 2020	1,873	3,404	(1,067)
Amortization of actuarial losses and prior service credits, net of tax of $18 million in 2022, $130 million in 2021 and $119 million in 2020	69	477	440
Pension settlement charge, net of tax of $314 million in 2022 and $355 million in 2021	1,156	1,310	0
Other, net, net of tax of $2 million in 2022, $11 million in 2021 and $5 million in 2020	(115)	(76)	60
Other comprehensive income (loss), net of tax	2,983	5,115	(567)
Comprehensive income	$ 8,715	$ 11,430	$ 6,266