Share Based Compensation (Details 4) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
Jul. 01, 2011
Stock option awards excluding awards issued under LTIP [Member]
Stock Options excluding long term incentive programs
Outstanding at January 1, 2011, Shares	3,659,924
Granted, Shares	61,806
Exercised, Shares	(1,358,656)
Expired or forfeited, Shares	(29,068)
Outstanding at July 1, 2011, Shares	2,334,006
Vested or expected to vest at July 1, 2011, Shares	2,304,438
Exercisable at July 1, 2011, Shares	2,001,903
Outstanding at Jan 1, 2011 , Weighted Average Exercise Price	$ 25.29
Settled, Weighted Average Exercise Price	$ 38.47
Exercised, Weighted Average Exercise Price	$ 26.12
Expired or forfeited, Weighted Average Exercise Price	$ 29.00
Outstanding at July 1, 2011, Weighted Average Exercise Price	$ 25.12
Vested or expected to vest at July 1, 2011, Weighted Average Exercise Price	$ 25.11
Exercisable at July 1, 2011, Weighted Average Exercise Price	$ 25.94
Outstanding at July 1, 2011, Weighted Average Remaining Contractual Term	5.0
Vested or expected to vest at July 1, 2011, Weighted Average Remaining Contractual Term	4.9
Exercisable at July 1, 2011, Weighted Average Remaining Contractual Term	4.4
Outstanding at July 1, 2011, Aggregate Intrinsic Value	$ 41,976
Vested or expected to vest at July 1, 2011, Aggregate Intrinsic Value	41,462
Exercisable at July 1, 2011, Aggregate Intrinsic Value	$ 34,346
Stock Awards excluding awards under LTIP [Member]
Nonvested Shares
Nonvested at January 1, 2011, Stock Awards	259,992
Awarded, Stock Awards	58,293
Vested, Stock Awards	(118,922)
Forfeited, Stock Awards	(5,238)
Nonvested at July 1, 2011, Stock Awards	194,125
Expected to vest at July 1, 2011, Stock Awards	178,909
Nonvested at January 1, Weighted Average Grant Date Fair Value	$ 18.27
Awarded, Weighted Average Grant Date Fair Value	$ 35.64
Vested, Weighted Average Grant Date Fair Value	$ 17.74
Forfeited, Weighted Average Grant Date Fair Value	$ 24.70
Nonvested at July 1, Weighted Average Grant Date Fair Value	$ 23.64
Expected to vest at July 1, 2011, Weighted Average Grant Date Value	$ 23.43

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Share Based Compensation Arrangement By ShareBased Payment Award Other Than Options Vested And Expected To Vest Outstanding Weighted Average Grant Date Fair Value.

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Share Based Compensation Arrangements By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period Weighted Average Grant Date Fair Value.

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Stock Options excluding long term incentive programs Abstract.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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The number of grants made 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 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).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options outstanding and currently exercisable under the option plan as of the balance sheet date.

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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 weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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The combined weighted average exercise price associated with stock options during the period that have either lapsed or been forfeited.

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- Definition

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

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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 stock options awarded under the plan during the reporting period.

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options outstanding under the plan as of the balance sheet date.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date.

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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 outstanding.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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The weighted-average period between the balance sheet date and expiration date for fully vested and expected to vest options outstanding, which may be expressed in a decimal value for number of years.

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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