Debt, Activity Under Credit Facilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Accounts Receivable Sales Facility [Member] | Line of Credit [Member]
Line of Credit Facility
Borrowings, short-term credit facilities	$ 1,850	$ 1,800
Repayments, short-term credit facilities	(1,850)	(1,800)
DGD Revolver [Member] | Line of Credit [Member]
Line of Credit Facility
Borrowings, long-term credit facilities	300	50
Repayments, long-term credit facilities	(200)	(50)
DGD Loan Agreement [Member] | Line of Credit [Member]
Line of Credit Facility
Borrowings, long-term credit facilities	50	0
Repayments, long-term credit facilities	(50)	0
IEnova Revolver [Member] | Line of Credit [Member]
Line of Credit Facility
Borrowings, long-term credit facilities	0	0
Repayments, long-term credit facilities	$ (14)	$ (12)