Derivative Instruments and Hedging Activities (Pre-Tax Gains (Losses) On Derivatives Designated As Hedging Instruments) (Details) - Designated As Hedging Instrument [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments, Gains (Loss) [Line Items]
Total amount recognized in earnings	$ (5)	$ (75)	$ 53	$ (109)
Cost Of Products Sold [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Commodity Contracts effective amount recognized in earnings	(18)	11	(18)	7
Commodity contracts ineffective amount recognized in earnings	9	(27)	(4)	(7)
Revenues [Member]
Derivative Instruments, Gains (Loss) [Line Items]
Commodity Contracts effective amount recognized in earnings	(2)	(58)	45	(85)
Commodity contracts ineffective amount recognized in earnings	0	(1)	7	(24)
Other Income (Expense) - Net [Member]
Derivative Instruments, Gains (Loss) [Line Items]
FX Contracts effective amount recognized in earnings	5	$ 0	22	$ 0
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness	$ 1		$ 1