Other Current Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Other Assets [Abstract]
Derivative Asset	$ 1,798		$ 1,798		$ 619
Deferred Receivables Consideration	272		272		446
Receivables from Customers	888		888		1,014
Financing Receivable, after Allowance for Credit Loss	331		331		395
Premiums Receivable, Net	25		25		41
Prepaid Expense, Current	308		308		318
Biodiesel tax credit	89		89		541
Tax receivables	665		665		579
Other Receivables	296		296		369
Other current assets	284		284		278
Total other current assets	4,956		4,956		4,600
Financing Receivable, Allowance for Credit Loss	4		4		3
Interest on financing receivables	4	$ 5	15	$ 19
Reinsurance Recoverables	$ 77		$ 77		$ 81