Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Not Designated As Hedging Instruments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Derivative [Line Items]
Total gain (loss) recognized in earnings	$ (883)	$ 95
Interest Expense [Member]
Derivative [Line Items]
Interest Contracts	0	0
Other Income (Expense) - Net [Member]
Derivative [Line Items]
Interest Contracts	0	0
FX Contracts	(9)	(45)
Revenues [Member]
Derivative [Line Items]
FX Contracts	(6)	73
Cost Of Products Sold [Member]
Derivative [Line Items]
FX Contracts	44	(1)
Commodity Contracts	$ (912)	$ 68