Shareholders' Equity (Summary Of Share-Based Awards) (Details) (Share Based Incentive Awards [Member], USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
Sep. 29, 2012 Y
Share Based Incentive Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Outstanding	1,634,030
Number of Shares, Exercisable	711,815
Number of Shares, Outstanding, Wtd. Avg. Exercise Price	$ 53.35
Number of Shares, Exercisable, Wtd. Avg. Exercise Price	$ 41.47
Number of Shares, Outstanding, Wtd. Avg. Remaining Contractual Term (years)	6.7
Number of Shares, Exercisable, Wtd. Avg. Remaining Contractual Term (years)	4.7
Outstanding Shares, Aggregate Intrinsic Value	$ 28.2
Exercisable Shars, Aggregate Intrinsic Value	$ 20.7

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The weighted average period between the balance sheet date and expiration for all vested portions of options outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

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As of the balance sheet date, the total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of fully vested and expected to vest options that are exercisable.

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