Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Designated As Hedging Instruments) (Details) (Designated As Hedging Instrument [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Derivative Instruments, Gains (Loss) [Line Items]
Total amount recognized in earnings	$ (34)	$ (45)
Interest Expense [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Interest contracts effective amount recognized in earnings	0	0
Cost Of Products Sold [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Commodity Contracts effective amount recognized in earnings	(4)	(2)
Commodity contracts ineffective amount recognized in earnings	20	(42)
Revenues [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Commodity Contracts effective amount recognized in earnings	(27)	(1)
Commodity contracts ineffective amount recognized in earnings	(23)	0
Other Income (Expense) - Net [Member]
Derivative Instruments, Gains (Loss) [Line Items]
FX Contracts effective amount recognized in earnings	$ 0	$ 0