Short-Term Borrowings (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Short-term Debt
Short-term borrowings, Balance	$ 5,395	$ 2,005
Commercial paper, net
Short-term Debt
Short-term borrowings, Balance	$ 4,896	$ 1,321
Short-term borrowings, Avg. Rate	0.10%	0.10%
Bank borrowings and other
Short-term Debt
Short-term borrowings, Balance	$ 213	$ 307
Short-term borrowings, Avg. Rate	4.50%	3.50%
Variable denomination floating rate demand notes
Short-term Debt
Short-term borrowings, Balance	$ 286	$ 377
Short-term borrowings, Avg. Rate	0.20%	0.30%