Retirement Programs - Pension and Postretirement Benefit Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Amount recognized in Net pension and OPEB cost (benefit), excluding service cost	$ (237)	$ (192)	$ (177)
Pensions
Defined Benefit Plan Disclosure [Line Items]
Service cost	127	157	152
Interest cost	201	154	213
Expected return on plan assets	(518)	(521)	(482)
Net amortization and deferral	74	171	86
Settlement charges	6	4	6
Amount recognized in Net pension and OPEB cost (benefit), excluding service cost	(237)	(192)	(177)
Net periodic benefit cost (benefit)	$ (110)	$ (35)	$ (25)