Shareholders' Equity (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 29, 2012	Dec. 31, 2011	Dec. 31, 2010
Stockholders' Equity Note [Abstract]
Recognized share-based compensation expense	$ 9.0	$ 14.3	$ 6.7
Unrecognized compensation cost related to share-based compensation	$ 22.2
Authorized shares of common stock	5.0
Share available for future grant or payment under the various plans	1.0
Share-based incentive awards, estimated life, years	7 years	7 years	7 years
Share-based incentive awards, risk-free interest rate	1.30%	2.30%	2.80%
Share-based incentive awards, expected dividend yield	1.20%	1.00%	1.10%
Share-based incentive awards, expected volatility	37.60%	35.60%	34.80%
Number of shares approved to be repurchased	3.0
Shares issued in settlement of the conversion premium for certain convertible notes			0.9

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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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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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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Number of shares issued during the period as a result of the conversion of convertible securities.

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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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