Derivative Instruments And Hedging Activities (Derivative Financial Instruments At Fair Value) (Details) (USD $) In Millions, unless otherwise specified	Apr. 01, 2012	Dec. 31, 2011
Derivative Instruments And Hedging Activities [Line Items]
Total	$ 65	$ 34
Designated As Hedging Instrument [Member] | Derivative Assets Included Other Current Assets [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets	68	64
Designated As Hedging Instrument [Member] | Derivative Liabilities Included Other Current Liabilities [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative liabilities	(23)	(33)
Not Designated As Hedging Instrument [Member] | Derivative Assets Included Other Current Assets [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative assets	32	20
Not Designated As Hedging Instrument [Member] | Derivative Liabilities Included Other Current Liabilities [Member]
Derivative Instruments And Hedging Activities [Line Items]
Derivative liabilities	$ (12)	$ (17)