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This element represents a certain statement of financial position asset caption which represents a class of assets, or which may include an individual asset, measured at fair value on a recurring basis.

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- Definition

This element represents restricted cash, which represents a class of assets, or which may include an individual asset, measured at fair value on a recurring basis.

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure.

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- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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- Definition

Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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- Definition

Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investments accounted for under the equity method of accounting as of the balance sheet date.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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Fair Value Measurements (Details) (USD $) In Millions	Oct. 01, 2011 Fair Value, Inputs, Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 1 [Member] Fair Value, Measurements, Recurring [Member]	Oct. 01, 2011 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member]	Jul. 02, 2011 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Nonrecurring [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Nonrecurring [Member]	Oct. 02, 2010 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Nonrecurring [Member]	Jul. 03, 2010 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Nonrecurring [Member]	Apr. 03, 2010 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Nonrecurring [Member]	Oct. 01, 2011 Fair Value, Inputs, Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Dec. 31, 2010 Fair Value, Inputs, Level 3 [Member] Fair Value, Measurements, Recurring [Member]	Oct. 01, 2011 Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Measurements, Recurring [Member]	Dec. 31, 2010 Estimate of Fair Value, Fair Value Disclosure [Member] Fair Value, Measurements, Recurring [Member]	Oct. 01, 2011 Fair Value, Measurements, Nonrecurring [Member]	Dec. 31, 2010 Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 141.7	$ 353.9	$ 0	$ 15.0						$ 0	$ 0	$ 141.7	$ 368.9
Short-term investments in marketable securities	5.8	10.8	68.3	73.9						0	0	74.1	84.7
Long-term investments in marketable securities	88.1	21.0	0	0						0	0	88.1	21.0
Restricted cash	20.0		0							0		20.0
Equity investments	1.7	2.0	0	0						0	0	1.7	2.0
Derivatives	0	0	5.7	3.5						0	0	5.7	3.5
Total assets	257.3	387.7	74.0	92.4						0	0	331.3	480.1
Derivatives	0	0	5.7	3.6						0	0	5.7	3.6
Total liabilities	0	0	5.7	3.6						0	0	5.7	3.6
Assets Measured at fair value on a non-recurring basis [Abstract]
Assets measured at fair value on a nonrecurring basis					$ 0.8	$ 8.5	$ 2.9	$ 2.5	$ 3.5					$ 0.8	$ 17.4