Fair Value Measurements (Fair Value Measurements At Reporting Date) (Details) (USD $) In Millions, unless otherwise specified																							3 Months Ended
	Sep. 30, 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]	Sep. 30, 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]	Sep. 30, 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]	Sep. 30, 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]	Sep. 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] Foreign Exchange Contracts [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Significant Other Observable Inputs (Level 2) [Member] Interest Rate Contracts [Member]	Sep. 30, 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]	Sep. 30, 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]	Sep. 30, 2011 Fair Value, Measurements, Recurring [Member] Total Fair Value [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Total Fair Value [Member]	Sep. 30, 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]	Sep. 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] Foreign Exchange Contracts [Member]	Jun. 30, 2011 Fair Value, Measurements, Recurring [Member] Total Fair Value [Member] Interest Rate Contracts [Member]	Sep. 30, 2011 Significant Unobservable Inputs (Level 3) [Member]
Threshold of relative value of unobservable inputs to the total fair value for Level 3																							10.00%
Assets:
Inventories carried at market					$ 4,550	$ 5,153						$ 1,348	$ 762			$ 5,898	$ 5,915
Unrealized derivative gains			1,217	1,198			1,438	1,457	260	237	3			270	112			2,925	2,767	260	237	3
Marketable securities	1,351	1,628			67	328										1,418	1,956
Total Assets	2,568	2,826			6,315	7,178						1,618	874			10,501	10,878
Liabilities:
Unrealized derivative losses			1,233	1,317			1,194	1,193	311	178				244	44			2,671	2,554	311	178
Inventory-related payables					181	278						134	45			315	323
Total Liabilities	$ 1,233	$ 1,317			$ 1,686	$ 1,649						$ 378	$ 89			$ 3,297	$ 3,055