Retirement Programs - Changes In Plan Assets and Benefit Obligations Recognized in OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Pensions
Defined Benefit Plan Disclosure [Line Items]
Current year net actuarial losses (gains)*	$ (779)	$ 598
Amortization of net actuarial gains (losses)	(173)	(89)
Plan amendment		7
Amortization of prior service credits (costs)	(3)	(1)
Pension settlements	(4)	(6)
Curtailments	0	(1)
Foreign currency translation and other changes	(39)	87
Total recognized in other comprehensive income	(998)	595
OPEB
Defined Benefit Plan Disclosure [Line Items]
Current year net actuarial losses (gains)*	(8)	(2)
Amortization of net actuarial gains (losses)	3	2
Plan amendment		(13)
Amortization of prior service credits (costs)	2	2
Pension settlements	0	0
Curtailments	0	0
Foreign currency translation and other changes		(1)
Total recognized in other comprehensive income	$ (3)	$ (12)