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	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Jun. 30, 2011
Derivative [Line Items]
Interest contracts effective amount recognized in earnings	$ 0	$ 0	$ 0	$ 0	$ 0	$ 30
Designated As Hedging Instrument [Member]
Derivative [Line Items]
Total amount recognized in earnings	129	57	(157)	129	57	409
Designated As Hedging Instrument [Member] | Interest Expense [Member]
Derivative [Line Items]
Interest contracts effective amount recognized in earnings	0	0	1	1	1	0
Interest contracts ineffective amount recognized in earnings						1
Designated As Hedging Instrument [Member] | Revenues [Member]
Derivative [Line Items]
Commodity Contracts effective amount recognized in earnings	2	8	4	(3)	3	(13)
Designated As Hedging Instrument [Member] | Cost Of Products Sold [Member]
Derivative [Line Items]
Commodity Contracts effective amount recognized in earnings	158	11	(41)	152	5	375
Commodity contracts ineffective amount recognized in earnings	(30)	39	(120)	(20)	49	46
Designated As Hedging Instrument [Member] | Other Income (Expense) - Net [Member]
Derivative [Line Items]
FX Contracts effective amount recognized in earnings	$ (1)	$ (1)	$ (1)	$ (1)	$ (1)	$ 0