Supplemental Income (Loss) Statement Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Other Income and Expenses [Abstract]
Interest expense	$ 304	$ 106	$ 571	$ 347
Interest income	(73)	(17)	(161)	(36)
Pension and postretirement net periodic benefit cost (benefit)	(31)	(65)	(93)	(199)
Total	$ 200	$ 24	$ 317	$ 112