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Fair Value Measurements And Financial Instruments Fair Value Measurements And Financial Instruments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012
Fair Value Disclosures [Abstract]
Fair Value, Estimate Not Practicable, Cost Method Investments	$ 91	$ 151
Fixed rate debt obligations fair value disclosure	2,490
Fixed rate debt obligations carrying value	2,386
Other debt carrying value	$ 969

This item represents a financial instrument (as defined) for which it is not practicable to estimate fair value. Such disclosure may be for an individual financial instrument or a class of financial instruments.

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