Stock Plans (Narrative) (Details) (USD $)	3 Months Ended
Apr. 01, 2012 years	Apr. 03, 2011	Jan. 01, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Former Stock-based Compensation Plans	1
Total income tax benefit recognized for stock-based compensation	$ 1,900,000	$ 1,000,000
Stock-based compensation costs capitalized as part of inventory	300,000	200,000
Options related excess tax benefit, classified as a financing cash activity	1,139,000	7,772,000
Total pre-tax stock-based compensation expense	5,476,000	3,054,000
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent	5,700,000
2009 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under plan	10,000,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under plan	5,000,000
Shares available for grant under employee stock purchase plan	1,200,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of options	$ 7.32	$ 7.81
Total intrinsic value of options exercised	4,300,000	5,100,000
Cash received from option exercises	9,500,000	18,000,000
Total pre-tax stock-based compensation expense	1,200,000	1,100,000
Total unrecognized compensation cost, net of estimated forfeitures, related to nonvested stock, granted	9,700,000
Weighted-average period for recognition of unrecognized compensation cost, years	2.4
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/units granted	349,000
Weighted-average grant-date fair value of stock granted (per share)	$ 25.83	$ 26.45
Fair value of restricted stock awards vested	2,900,000	2,900,000
Total pre-tax stock-based compensation expense	2,000,000	1,400,000
Awards/units outstanding	889,000		672,000
Total unrecognized compensation cost, net of estimated forfeitures, related to nonvested stock, granted	16,100,000
Weighted-average period for recognition of unrecognized compensation cost, years	1.9
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/units granted	122,675	89,828
Weighted-average grant-date fair value of stock granted (per share)	$ 26.18	$ 26.71
Total pre-tax stock-based compensation expense	2,200,000	500,000
Awards/units outstanding	322,516
Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares/units granted	955
Weighted-average grant-date fair value of stock granted (per share)	$ 26.18
Total pre-tax stock-based compensation expense	$ 0	$ 0

Number of Former Stock-based Compensation Plans

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements.

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Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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Reductions in the entity's income taxes that arise when compensation cost (from non-qualified share-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements. This element represents the cash inflow reported in the enterprise's financing activities.

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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).

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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).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

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

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