Derivative and Other Financial Instruments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax			$ 40	$ (93)	$ 11
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax			7
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(12)	(48)	(12)	(48)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Tax [Line Items]	4		4
Objectives for Using Derivative Instruments	The Company’s objective in managing exposure to market risk is to limit the impact on earnings and cash flow.
Net loss to be reclassified to earnings			(15)
Loss, net of tax, expected to be reclassified to earnings			(11)
Reclassification of anticipated transactions that were no longer considered probable		0	0
Changes in fair value of the derivative financial instruments, excluded from the assessment and measurement of hedge effectiveness reported in earnings			1
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax			76	(54)	(31)
Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on foreign exchange contracts designated as fair value hedges			4	1
Gain (loss) on foreign exchange contracts not designated as fair value hedges			2	(33)
Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Price Risk Cash Flow Hedge Ineffectiveness			(3)
Minimum [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Lower Remaining Maturity Range			1 month
Maximum [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Higher Remaining Maturity Range			34 months
Net Investment Hedging [Member] | Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax			(10)
Net Investment Hedging [Member] | Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax			$ (6)