Employee Stock Benefit Plans (Schedule Of Options Outstanding And Expected To Vest) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
Dec. 28, 2018	Dec. 29, 2017
Employee Benefits and Share-based Compensation, Noncash [Abstract]
Number Of Shares, Options outstanding	4.4
Options, Grants in Period	0.1	0.0
Option exercised	(2.1)
Number Of Shares, Options outstanding	2.4	4.4
Options exercisable	2.3
Weighted-Average Exercise Price per Share, Options outstanding	$ 26.12
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	34.94
Options, Exercises in Period, Weighted Average Exercise Price	23.91
Weighted-Average Exercise Price per Share, Options outstanding	28.26	$ 26.12
Options exercisable, Weighted Average Exercise Price	$ 28.14
Weighted-Average Remaining Contractual Term (in years), Options outstanding and expected to vest	1 year 11 months 9 days
Weighted-Average Remaining Contractual Term (in years), Options exercisable	1 year 9 months 11 days
Aggregate Intrinsic Value, Options outstanding and expected to vest	$ 10.3
Aggregate Intrinsic Value, Options exercisable	$ 10.0

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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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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of share options (or share units) exercised during the current period.

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