Fair Value Measurements (Fair Value Measurements At Reporting Date) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Assets:
Derivative Asset	$ 1,549	$ 1,546
Liabilities:
Derivative Liability	977	1,101
Fair Value, Recurring [Member]
Assets:
Inventories carried at market	6,707	6,987
Cash Equivalents, at Carrying Value	206	209
Restricted Investments, at Fair Value	1,663	1,362
Total Assets	10,125	10,104
Liabilities:
Inventory-related payables	1,990	1,320
Total Liabilities	2,967	2,421
Fair Value, Recurring [Member] | Commodity Contracts [Member]
Assets:
Derivative Asset	1,362	1,359
Liabilities:
Derivative Liability	883	957
Fair Value, Recurring [Member] | Foreign Exchange Contracts [Member]
Assets:
Derivative Asset	187	187
Liabilities:
Derivative Liability	94	144
Fair Value, Recurring [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Assets:
Inventories carried at market	0	0
Cash Equivalents, at Carrying Value	206	209
Restricted Investments, at Fair Value	1,663	1,362
Total Assets	1,869	1,571
Liabilities:
Inventory-related payables	0	0
Total Liabilities	0	0
Fair Value, Recurring [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Commodity Contracts [Member]
Assets:
Derivative Asset	0	0
Liabilities:
Derivative Liability	0	0
Fair Value, Recurring [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Foreign Exchange Contracts [Member]
Assets:
Derivative Asset	0	0
Liabilities:
Derivative Liability	0	0
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Inventories carried at market	3,759	4,274
Cash Equivalents, at Carrying Value	0	0
Restricted Investments, at Fair Value	0	0
Total Assets	4,544	5,089
Liabilities:
Inventory-related payables	1,928	1,219
Total Liabilities	2,470	1,863
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Commodity Contracts [Member]
Assets:
Derivative Asset	598	628
Liabilities:
Derivative Liability	448	500
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Foreign Exchange Contracts [Member]
Assets:
Derivative Asset	187	187
Liabilities:
Derivative Liability	94	144
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets:
Inventories carried at market	2,948	2,713
Cash Equivalents, at Carrying Value	0	0
Restricted Investments, at Fair Value	0	0
Total Assets	3,712	3,444
Liabilities:
Inventory-related payables	62	101
Total Liabilities	497	558
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Commodity Contracts [Member]
Assets:
Derivative Asset	764	731
Liabilities:
Derivative Liability	435	457
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Foreign Exchange Contracts [Member]
Assets:
Derivative Asset	0	0
Liabilities:
Derivative Liability	$ 0	$ 0