Financial Instruments (Financial Instruments Measured On Recurring Basis Using Significant Unobservable Input Level 3) (Details) (USD $) In Millions	3 Months Ended	6 Months Ended
Jul. 02, 2011	Jun. 26, 2010	Jul. 02, 2011	Jun. 26, 2010
Auction Rate Securities [Member]
Beginning balance	$ 57	$ 150	$ 57	$ 159
Redemption at par	(6)	(40)	(6)	(48)
Gain (loss) included in net income	1	1	1	1
Change in fair value included in other comprehensive income (loss)	0	(3)		(4)
Ending balance	52	108	52	108
UBS Put Option [Member]
Beginning balance		2		2
Redemption at par		0
Gain (loss) included in net income		(1)		(1)
Change in fair value included in other comprehensive income (loss)		0
Ending balance		$ 1		$ 1

This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in other comprehensive income (a separate component of shareholders' equity).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32
-Subparagraph c(1)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncome
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration