Fair Value Measurements - Fair Value Measurements at Reporting Date (Details) - Recurring - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Assets:
Inventories carried at market	$ 6,961	$ 6,987
Cash equivalents	70	209
Marketable securities	246
Segregated investments	1,681	1,362
Total Assets	10,066	10,104
Liabilities:
Inventory-related payables	742	1,320
Total Liabilities	1,714	2,421
Commodity contracts
Assets:
Unrealized gains on derivative contracts	831	1,359
Liabilities:
Unrealized losses on derivative contracts	760	957
Foreign exchange contracts
Assets:
Unrealized gains on derivative contracts	272	187
Liabilities:
Unrealized losses on derivative contracts	212	144
Interest rate contracts
Assets:
Unrealized gains on derivative contracts	5
Level 1
Assets:
Inventories carried at market	0	0
Cash equivalents	70	209
Marketable securities	246
Segregated investments	1,681	1,362
Total Assets	1,997	1,571
Liabilities:
Inventory-related payables	0	0
Total Liabilities	0	0
Level 1 | Commodity contracts
Assets:
Unrealized gains on derivative contracts	0	0
Liabilities:
Unrealized losses on derivative contracts	0	0
Level 1 | Foreign exchange contracts
Assets:
Unrealized gains on derivative contracts	0	0
Liabilities:
Unrealized losses on derivative contracts	0	0
Level 1 | Interest rate contracts
Assets:
Unrealized gains on derivative contracts	0
Level 2
Assets:
Inventories carried at market	3,930	4,274
Cash equivalents	0	0
Marketable securities	0
Segregated investments	0	0
Total Assets	4,611	5,089
Liabilities:
Inventory-related payables	654	1,219
Total Liabilities	1,221	1,863
Level 2 | Commodity contracts
Assets:
Unrealized gains on derivative contracts	404	628
Liabilities:
Unrealized losses on derivative contracts	355	500
Level 2 | Foreign exchange contracts
Assets:
Unrealized gains on derivative contracts	272	187
Liabilities:
Unrealized losses on derivative contracts	212	144
Level 2 | Interest rate contracts
Assets:
Unrealized gains on derivative contracts	5
Level 3
Assets:
Inventories carried at market	3,031	2,713
Cash equivalents	0	0
Marketable securities	0
Segregated investments	0	0
Total Assets	3,458	3,444
Liabilities:
Inventory-related payables	88	101
Total Liabilities	493	558
Level 3 | Commodity contracts
Assets:
Unrealized gains on derivative contracts	427	731
Liabilities:
Unrealized losses on derivative contracts	405	457
Level 3 | Foreign exchange contracts
Assets:
Unrealized gains on derivative contracts	0	0
Liabilities:
Unrealized losses on derivative contracts	0	$ 0
Level 3 | Interest rate contracts
Assets:
Unrealized gains on derivative contracts	$ 0