Risk Management (Summary Of Fair Values And Location In Condensed Consolidated Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Mar. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	$ 2	$ 3
Fair value of derivative liabilities	8	7
Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets		1
Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities		0
Not Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	2	2
Fair value of derivative liabilities	8	7
Not Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	2	2
Not Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	4	3
Not Designated As Hedging Instruments [Member] | Interest Agreement Contracts [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0	0
Not Designated As Hedging Instruments [Member] | Interest Agreement Contracts [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	$ 4	$ 4