Fair Value Measurements (Fair Value Measurements At Reporting Date) (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Assets:
Inventories carried at market	$ 6,987	$ 9,041
Cash Equivalents	209	405
Segregated investments	1,362	1,453
Total Assets	10,104	12,603
Liabilities:
Inventory-related payables	1,320	1,270
Total Liabilities	2,421	2,819
Commodity Contracts [Member]
Assets:
Derivative Asset	1,359	1,337
Liabilities:
Derivative Liability	957	1,268
Foreign Exchange Contract [Member]
Assets:
Derivative Asset	187	258
Liabilities:
Derivative Liability	144	275
Interest Rate Contracts [Member]
Assets:
Derivative Asset		109
Embedded Derivative Financial Instruments
Liabilities:
Derivative Liability		6
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Assets:
Inventories carried at market	0	0
Cash Equivalents	209	405
Segregated investments	1,362	1,453
Total Assets	1,571	1,858
Liabilities:
Inventory-related payables	0	0
Total Liabilities	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Commodity Contracts [Member]
Assets:
Derivative Asset	0	0
Liabilities:
Derivative Liability	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Foreign Exchange Contract [Member]
Assets:
Derivative Asset	0	0
Liabilities:
Derivative Liability	0	0
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Inventories carried at market	4,274	6,281
Segregated investments	0
Total Assets	5,089	7,444
Liabilities:
Inventory-related payables	1,219	1,181
Total Liabilities	1,863	2,121
Significant Other Observable Inputs (Level 2) [Member] | Commodity Contracts [Member]
Assets:
Derivative Asset	628	796
Liabilities:
Derivative Liability	500	665
Significant Other Observable Inputs (Level 2) [Member] | Foreign Exchange Contract [Member]
Assets:
Derivative Asset	187	258
Liabilities:
Derivative Liability	144	275
Significant Other Observable Inputs (Level 2) [Member] | Interest Rate Contracts [Member]
Assets:
Derivative Asset		109
Significant Unobservable Inputs (Level 3) [Member]
Assets:
Inventories carried at market	2,713	2,760
Total Assets	3,444	3,301
Liabilities:
Inventory-related payables	101	89
Total Liabilities	558	698
Significant Unobservable Inputs (Level 3) [Member] | Commodity Contracts [Member]
Assets:
Derivative Asset	731	541
Liabilities:
Derivative Liability	457	603
Significant Unobservable Inputs (Level 3) [Member] | Foreign Exchange Contract [Member]
Assets:
Derivative Asset	0	0
Liabilities:
Derivative Liability	$ 0	0
Significant Unobservable Inputs (Level 3) [Member] | Embedded Derivative Financial Instruments
Liabilities:
Derivative Liability		$ 6