Retirement Programs - Schedule of Pension and OPEB Net Periodic Benefit Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Amount recognized in Operating Profit
Service cost	$ 21	$ 33
Amount recognized in Net pension and OPEB cost (benefit), excluding service cost
Interest cost	92	53
Expected return on plan assets	(129)	(136)
Net amortization and deferral	(8)	19
Net pension and OPEB cost (benefit)	(45)	(64)
Net periodic benefit cost (benefit)	$ (24)	$ (31)