Debt, Narrative (Details) - USD ($)		1 Months Ended	6 Months Ended	9 Months Ended
		Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2021		May 31, 2021	Apr. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Apr. 30, 2020
IEnova Revolver [Member] | Line of Credit [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Central Mexico Terminals [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 743,000,000	$ 660,000,000
Interest rate at period end (percent)				3.497%					3.87%
Senior Notes [Member]
Debt Instrument [Line Items]
Proceeds from issuance of senior long-term debt			$ 4,020,000,000.00
Line of Credit [Member] | DGD Revolver [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Diamond Green Diesel Holdings LLC [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 400,000,000	[1]			$ 400,000,000
Option to increase aggregate commitments under line of credit facility, increase limit, subject to certain restrictions								550,000,000
Line of Credit [Member] | DGD Revolver Letter Of Credit [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Diamond Green Diesel Holdings LLC [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				50,000,000				$ 10,000,000
Debt instrument, covenant, indebtedness limitation				$ 25,000,000
Interest rate at period end (percent)				1.84%
Line of Credit [Member] | IEnova Revolver [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Central Mexico Terminals [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	[1]			$ 743,000,000
Floating Rate Senior Notes Due September 15, 2023 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Early repayment of senior debt				$ 575,000,000
Debt instrument, redemption price, percentage of principal amount redeemed (percent)				100.00%
Floating Rate Senior Notes Due September 15, 2023 [Member] | Senior Notes [Member] | Three-month LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		1.15%
Senior Notes Due March 15, 2024 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Face amount of long-term debt issuance		$ 925,000,000	$ 925,000,000
Stated rate on debt instrument (percent)		1.20%	1.20%
Senior Notes Due April 15, 2025, Issued September 2020 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Face amount of long-term debt issuance		$ 400,000,000	$ 400,000,000
Stated rate on debt instrument (percent)		2.85%	2.85%
Senior Notes Due September 15, 2027 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Face amount of long-term debt issuance		$ 600,000,000	$ 600,000,000
Stated rate on debt instrument (percent)		2.15%	2.15%
Senior Notes Due April 15, 2023 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Face amount of long-term debt issuance										$ 850,000,000
Stated rate on debt instrument (percent)										2.70%
Senior Notes Due April 15, 2025, Issued April 2020 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Face amount of long-term debt issuance										$ 650,000,000
Stated rate on debt instrument (percent)										2.85%

[1] Creditors of our VIEs do not have recourse against us.