Fair Value Measurements - Assets and Liabilities Accounted for at Fair Value on a Recurring Basis (Details) - Recurring - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Assets:
Inventories carried at market	$ 5,359	$ 6,961
Cash equivalents	447	70
Marketable securities	9	246
Segregated investments and restricted cash equivalents	1,902	1,681
Total Assets	8,927	10,066
Liabilities:
Inventory-related payables	974	742
Total Liabilities	2,094	1,714
Commodity contracts
Assets:
Unrealized gains on derivative contracts	1,010	831
Liabilities:
Unrealized losses on derivative contracts	708	760
Foreign currency contracts
Assets:
Unrealized gains on derivative contracts	181	272
Liabilities:
Unrealized losses on derivative contracts	412	212
Interest rate contracts
Assets:
Unrealized gains on derivative contracts	19	5
Level 1
Assets:
Inventories carried at market	0	0
Cash equivalents	447	70
Marketable securities	9	246
Segregated investments and restricted cash equivalents	1,902	1,681
Total Assets	2,358	1,997
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 currency 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	0
Level 2
Assets:
Inventories carried at market	2,652	3,930
Cash equivalents	0	0
Marketable securities	0	0
Segregated investments and restricted cash equivalents	0	0
Total Assets	3,266	4,611
Liabilities:
Inventory-related payables	933	654
Total Liabilities	1,668	1,221
Level 2 | Commodity contracts
Assets:
Unrealized gains on derivative contracts	414	404
Liabilities:
Unrealized losses on derivative contracts	323	355
Level 2 | Foreign currency contracts
Assets:
Unrealized gains on derivative contracts	181	272
Liabilities:
Unrealized losses on derivative contracts	412	212
Level 2 | Interest rate contracts
Assets:
Unrealized gains on derivative contracts	19	5
Level 3
Assets:
Inventories carried at market	2,707	3,031
Cash equivalents	0	0
Marketable securities	0	0
Segregated investments and restricted cash equivalents	0	0
Total Assets	3,303	3,458
Liabilities:
Inventory-related payables	41	88
Total Liabilities	426	493
Level 3 | Commodity contracts
Assets:
Unrealized gains on derivative contracts	596	427
Liabilities:
Unrealized losses on derivative contracts	385	405
Level 3 | Foreign currency 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	$ 0