Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010	Dec. 31, 2010
Income Taxes [Abstract]
Income tax provision	$ 0	$ 5.3	$ 30.8	$ 20.8
Amount of tax provision related to reassessment of tax reserves	0.5	0.5	(1.6)	(0.3)
Effective tax rate (in hundredths)	0.00%		23.30%
Gross unrecognized tax benefits, including interest	32.0		32.0		36.9
Possible decrease of total amount of gross unrecognized tax benefits due to settlements with taxing authorities or lapses in the statute of limitations	10.3		10.3
Number of months from reporting date for possible decrease of total amount of gross unrecognized tax benefits (in months)			12
Interest accrued related to unrecognized tax benefits	3.9		3.9		4.9
Penalties related to unrecognized tax benefits	$ 0		$ 0

Number of months from reporting date for the occurrence of a particular event.

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- Definition

Amount represents the portion of income tax provision (benefit) related to the reassessment of tax reserves.

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A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

+ References

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Income Tax Expense (or Benefit)

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-Number 210

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h))

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- Definition

The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

+ References

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-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 48

-Paragraph 21

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- Definition

The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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-Glossary Unrecognized Tax Benefit

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- Definition

This element represents the amount of statutory penalties accrued as of the date of the statement of financial position for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

+ References

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-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 48

-Paragraph 16

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- Definition

This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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