Share-Based Payments Narrative (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation expense related to non-vested shares from share-based compensation arrangements (in dollars)	$ 26.7
Weighted-average period over which compensation expense is expected to be recognized (in years)	1 year 7 months 6 days
Proceeds from Stock Plans	20.2	27.2
Class B common stock, non-voting [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock approved by Board of Directors and available for issuance (in shares)	7.4
Options and Sosars [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	8.9	8.9
Proceeds from Stock Plans	20.2	27.2
Expected term	7 years 6 months	7 years 8 months 12 days
Risk-free interest rate (percent)	2.29%	1.43%
Dividend yield (percent)	2.57%	2.88%
Rsus and Dsus [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value	$ 58.17
PUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value	$ 0.00
PSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Grant date fair value	$ 58.69	$ 43.10
Expected term	2 years 9 months 26 days	2 years 9 months 29 days
Volatility rate (percent)	21.72%	21.13%
Risk-free interest rate (percent)	0.72%	0.33%
Dividend yield (percent)	2.57%	2.88%
Minimum [Member] \| Options and Sosars [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility rate (percent)	22.66%	22.39%
Maximum [Member] \| Options and Sosars [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility rate (percent)	26.57%	25.90%
Gross [Member] \| Options and Sosars [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax Benefit from Stock Options Exercised	$ 2.0	$ 1.6

Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 20

-Section 55

-Paragraph 20

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The cash inflow associated with the amount received from the stock plan during the period.

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-Glossary Financing Activities

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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