Inventories, Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Designated As Hedging Instruments) (Details) (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]
Interest contracts effective amount recognized in earnings				$ 30	$ (59)
Designated As Hedging Instrument [Member]
Derivative [Line Items]
Total amount recognized in earnings	129	57	57	409	(141)
Designated As Hedging Instrument [Member] | Interest Expense [Member]
Derivative [Line Items]
Interest contracts effective amount recognized in earnings	0	0	1	0	0
Interest contracts ineffective amount recognized in earnings				1
Designated As Hedging Instrument [Member] | Net Sales And Other Operating Income [Member]
Derivative [Line Items]
Commodity Contracts effective amount recognized in earnings	2	8	3	(13)	0
Designated As Hedging Instrument [Member] | Cost Of Products Sold [Member]
Derivative [Line Items]
Commodity Contracts effective amount recognized in earnings	158	11	5	375	(85)
Commodity contracts ineffective amount recognized in earnings	(30)	39	49	46	(55)
Designated As Hedging Instrument [Member] | Other Income (Expense) - Net [Member]
Derivative [Line Items]
FX Contracts effective amount recognized in earnings	$ (1)	$ (1)	$ (1)	$ 0	$ (1)