Inventories, Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Not Designated As Hedging Instruments) (Details) (Not Designated As Hedging Instrument [Member], USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Derivative [Line Items]
Total gain (loss) recognized in earnings	$ 368	$ (156)	$ (687)	$ (1,094)	$ 204
Interest Expense [Member]
Derivative [Line Items]
Interest Contracts	0	0	0	0	0
Net Sales And Other Operating Income [Member]
Derivative [Line Items]
FX Contracts	129	33	117	(14)	0
Cost Of Products Sold [Member]
Derivative [Line Items]
FX Contracts	(49)	(116)	(255)	150	61
Commodity Contracts	136	(4)	(527)	(1,303)	242
Other Income (Expense) - Net [Member]
Derivative [Line Items]
Interest Contracts				30	(57)
FX Contracts	94	(69)	(21)	43	(42)
Other Contracts	$ 58		$ (1)	$ 0	$ 0