Stock-Based Compensation (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Apr. 01, 2012	Apr. 03, 2011
Share-Based Compensation Arrangement By Share-based Payment Award [Line Items]
Restricted stock unit awards to employees	1.5	1.5
Weighted average grant date fair value of restricted stock units granted	$ 16.88	$ 16.23
Number of service-based stock options granted to executive officers	0.2	0.1
Weighted average grant date fair value of stock options granted to executive officers	$ 6.85	$ 6.74
Term of stock options granted, years	seven
Stock Options [Member]
Share-Based Compensation Arrangement By Share-based Payment Award [Line Items]
Period of stock granted to employees and executive officers vest in equal installments, years	4
Stock Purchase Rights [Member]
Share-Based Compensation Arrangement By Share-based Payment Award [Line Items]
Weighted average grant date fair value of stock options granted to executive officers	$ 4.09	$ 3.66
Restricted Stock Units [Member]
Share-Based Compensation Arrangement By Share-based Payment Award [Line Items]
Period of stock granted to employees and executive officers vest in equal installments, years	four

Description of the period of time over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, which may be expressed in a variety of ways (for example, in years, month and year).

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- Definition

The maximum vesting term over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition.

+ References

No definition available.

+ Details

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

+ Details

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(c)

-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 Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Details

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- Definition

Net number of share options (or share units) granted during the period.

+ References

+ Details

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

+ Details

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