Debt, Activity Under Credit Facilities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025
Accounts Receivable Sales Facility [Member] | Line of Credit [Member]
Line of Credit Facility
Borrowings, short-term credit facilities	$ 1,850	$ 4,950
Repayments, short-term credit facilities	(1,850)	(4,950)
DGD Revolver [Member] | Line of Credit [Member]
Line of Credit Facility
Borrowings, long-term credit facilities	400	400
Repayments, long-term credit facilities	(400)	(300)
DGD Loan Agreement [Member] | Line of Credit [Member]
Line of Credit Facility
Borrowings, long-term credit facilities	150	0
Repayments, long-term credit facilities	(150)	0
IEnova Revolver [Member] | Line of Credit [Member]
Line of Credit Facility
Repayments, long-term credit facilities	$ (21)	$ (27)