Retirement Programs - Changes In Plan Assets and Benefit Obligations Recognized in OCI (Details) - Pensions - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Current year net actuarial losses (gains)	$ 480	$ (1,259)
Amortization of net actuarial gains (losses)	29	(75)
Amortization of prior service credits (costs)	1	1
Pension settlements	(16)	(6)
Foreign currency translation and other changes	0	(90)
Total recognized in other comprehensive income	$ 494	$ (1,429)