Fair Value Measurements - Reconciliation of Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Cost of products sold
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of products sold	Cost of products sold
Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 3,444	$ 3,301
Total increase (decrease) in net realized/unrealized gains included in cost of products sold	1,656	1,892
Purchases	16,296	29,929
Sales	(16,609)	(30,038)
Settlements	(1,369)	(1,563)
Transfers into Level 3	1,657	1,955
Transfers out of Level 3	(1,617)	(2,032)
Balance at end of period	3,458	3,444
Unrealized gains relating to Level 3 assets		2,100
Level 3 | Inventories Carried at Market
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	2,713	2,760
Total increase (decrease) in net realized/unrealized gains included in cost of products sold	646	432
Purchases	16,296	29,929
Sales	(16,609)	(30,038)
Settlements	0	(4)
Transfers into Level 3	1,416	1,584
Transfers out of Level 3	(1,431)	(1,950)
Balance at end of period	3,031	2,713
Level 3 | Commodity Derivative Contracts Gains
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	731	541
Total increase (decrease) in net realized/unrealized gains included in cost of products sold	1,010	1,460
Purchases	0	0
Sales	0	0
Settlements	(1,369)	(1,559)
Transfers into Level 3	241	371
Transfers out of Level 3	(186)	(82)
Balance at end of period	$ 427	$ 731