Employee Benefit And Retirement Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 30, 2011	Dec. 31, 2010	Jan. 01, 2010
Defined Benefit Plan Disclosure [Line Items]
Employer matching percent for employee contributions	4.00%
Employer contribution approved by board of directors	2.00%	2.00%	2.00%
Employer contribution to 401(k) plan	$ 27.6	$ 27.5	$ 26.5
Long-term portion of the deferred income obligation is included in other long-term liabilities	20.9
Current portion of deferred income obligation is included in other accrued liabilities	2.0
Defined Benefit Plan, Special Termination Benefits	(0.8)
Curtailment primarily due to reduction of employees	0.7
Amount of unrecognized prior service cost to be amortized in the next fiscal year	0.1
Amount of actuarial gain to be amortized in the next fiscal year	0.1
Unrecognized prior service cost, net of tax, included in accumulated other comprehensive income	0.2
Unrecognized net gain, net of tax, included in accumulated other comprehensive income	$ 2.0
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation percentage	37.00%	28.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation percentage	26.00%	25.00%
Guaranteed Income Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset allocation percentage	37.00%	47.00%

Defined Contribution Plan Employer Matching Percent Of Employee Contribution

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Discretionary 401(K) contribution approved by the Board of Directors

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Unrecognized actuarial gain in other comprehensive income, net of tax.

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable within one year (or the operating cycle, if longer). Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

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The amounts in accumulated other comprehensive income related to gains and losses that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

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The amounts in accumulated other comprehensive income related to prior service cost or credit expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

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- Definition

Disclosure under FAS 132R, before it was amended by FAS 158, of the portion of prior service costs and credits, due to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost.

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The amount of decrease that is related to an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.

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The amount of net gain (loss) recognized in net periodic benefit cost as a result of an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.

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The aggregate percentage of the fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of total plan assets held as of the measurement date.

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The amount of the cost recognized during the period for defined contribution plans.

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