Fair Value Measurements (Fair Value Measurements At Reporting Date) (Details) (USD $) In Millions, unless otherwise specified			6 Months Ended
	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Commodity Contracts [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Commodity Contracts [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Significant Other Observable Inputs (Level 2) [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Significant Other Observable Inputs (Level 2) [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Significant Other Observable Inputs (Level 2) [Member] Commodity Contracts [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Significant Other Observable Inputs (Level 2) [Member] Commodity Contracts [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Significant Other Observable Inputs (Level 2) [Member] Foreign Exchange Contracts [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Significant Other Observable Inputs (Level 2) [Member] Foreign Exchange Contracts [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Significant Other Observable Inputs (Level 2) [Member] Interest Rate Contracts [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Significant Unobservable Inputs (Level 3) [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Significant Unobservable Inputs (Level 3) [Member] Commodity Contracts [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Significant Unobservable Inputs (Level 3) [Member] Commodity Contracts [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Total Fair Value [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Total Fair Value [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Total Fair Value [Member] Commodity Contracts [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Total Fair Value [Member] Commodity Contracts [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Total Fair Value [Member] Foreign Exchange Contracts [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Total Fair Value [Member] Foreign Exchange Contracts [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Total Fair Value [Member] Interest Rate Contracts [Member]
Threshold of relative value of unobservable inputs to the total fair value for Level 3			10.00%
Assets:
Inventories carried at market								$ 4,798	$ 5,153						$ 1,624	$ 762			$ 6,422	$ 5,915
Unrealized derivative gains	2,423	3,007				1,200	1,198			737	1,457	288	237	3			198	112			2,135	2,767	288	237	3
Marketable securities				1,790	1,628			93	328										1,883	1,956
Total Assets				2,990	2,826			5,916	7,178						1,822	874			10,728	10,878
Liabilities:
Unrealized derivative losses	2,549	2,732				1,295	1,317			755	1,193	307	178				192	44			2,242	2,554	307	178
Inventory-related payables								425	278						196	45			621	323
Total Liabilities				$ 1,295	$ 1,317			$ 1,487	$ 1,649						$ 388	$ 89			$ 3,170	$ 3,055