Financial Instruments and Fair Value Measures (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010
Commodity Contracts [Member]
Fair Value Disclosures Paragraph Details [Line Items]
Derivative Notional Amount	$ 45	$ 23
Interest Rate Swap Agreements [Member]
Fair Value Disclosures Paragraph Details [Line Items]
Derivative Notional Amount	1,400	600
Fixed rate debt percent changed to LIBOR	4.09%	3.88%
Foreign Currency Exchange Contracts [Member]
Fair Value Disclosures Paragraph Details [Line Items]
Derivative Notional Amount	$ 4,631	$ 5,733