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		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments, Gains (Loss) [Line Items]
Total amount recognized in earnings	$ (124)	$ (76)	$ (233)	$ (131)
Interest Expense [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Interest contracts effective amount recognized in earnings	1	1	1	1
Cost Of Products Sold [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Commodity Contracts effective amount recognized in earnings	(110)	(2)	(103)	(7)
Commodity contracts ineffective amount recognized in earnings	(12)	(73)	(19)	(128)
Revenues [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Commodity Contracts effective amount recognized in earnings	(1)	(2)	(86)	3
Commodity contracts ineffective amount recognized in earnings	(4)	0	(28)	0
Other Income (Expense) - Net [Member]
Derivative Instruments, Gains (Loss) [Line Items]
FX Contracts effective amount recognized in earnings	$ 2	$ 0	$ 2	$ 0