Total stock-based compensation expense based on actual achievement of performance goals.

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- Definition

The number of available shares expired under the plan.

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No definition available.

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Price target for market-based awards.

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Maximum stock-based compensation expense assuming the achievement of highest level of performance goals.

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Represents automatic annual increase in shares.

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The value of shares an employee can purchase under the plan per period.

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Represents percentage of outstanding shares of common stock on the first day of the year.

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Post-vesting restrictions on the sale of awarded, vested shares.

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The maximum number of PSU's an employee may receive as a percentage

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Number of individual price target.

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Number of individual tranches in a single share-based payment award plan.

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The number of performance conditions required to be met under the stock plan.

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Total amount of performance metrics that are able to be met under the stock plan.

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Represents the intrinsic value for stock purchased under the employee stock purchase plan.

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Total MSUs earned under the program.

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Total PSUs earned under the program.

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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 holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (j)
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-Name Accounting Standards Codification
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The cash inflow associated with the amount received from the stock plan during the period.

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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 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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Restrictions on equity-based instruments during the vesting period, such as the inability to transfer unvested awards, are not taken into account in estimating the fair value of the award. However, restrictions that remain in effect after an award is vested, such as the inability to transfer or hedge vested options or a prohibition on the sale of outstanding vested shares (or other type of equity) for a period of time, affect the estimate of an award's fair value.

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

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The highest quantity of shares an employee can purchase under the plan per period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 718
-SubTopic 10
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-Paragraph 2
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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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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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Price of a single share of a number of saleable stocks of a company.

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Percentage of vesting of share-based compensation awards.

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Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

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Intrinsic value of equity-based compensation awards vested. Excludes stock and unit options.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
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Note 7 - Stock-Based Compensation (Details)	1 Months Ended									12 Months Ended			15 Months Ended
Note 7 - Stock-Based Compensation (Details)	Feb. 29, 2016 USD ($) shares	Feb. 28, 2016 USD ($)	Dec. 31, 2015 USD ($) $ / shares shares	Feb. 28, 2015 USD ($) shares	Apr. 30, 2014 shares	Feb. 28, 2014 shares	Dec. 31, 2013 USD ($) $ / shares shares	Feb. 28, 2013 USD ($) shares	Mar. 31, 2004 shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($) $ / shares shares	Feb. 28, 2015 shares	Nov. 13, 2014 shares
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares) \| shares										1,562,000	1,426,000	2,974,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value										$ 18,600,000	$ 17,300,000	$ 27,800,000
Proceeds from Stock Options Exercised										7,744,000	11,941,000	37,877,000
Proceeds from Stock Plans										2,227,000	2,078,000	2,145,000
Restricted Stock Units (RSUs) [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested										49,200,000	$ 28,900,000	$ 18,600,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding			$ 269,600,000							$ 269,600,000
Share Price (in Dollars per share) \| $ / shares			$ 63.71							$ 63.71
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized			$ 86,000,000							$ 86,000,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition										5 years
Time-Based RSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares) \| shares										271,000	335,000	299,000
MPSUs 2015 [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share Price (in Dollars per share) \| $ / shares			$ 61.35							$ 61.35
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares) \| shares			127,000
Share Based Compensation Share Based Payment Other Than Options Percentage Allowed			500.00%
Share-based Compensation, Arrangement by Share-based Payment Award, Number of Tranches			4
Share-Based Compensation Arrangement by Share-based Payment Award, Sales Prohibited After Vesting			2 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate			33.20%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate			1.30%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate			0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions			7.80%
MPSUs 2015 [Member] \| Second, Third, and Fourth Tranches [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Awards, Performance Conditions, Total			6
MPSUs 2015 [Member] \| Pro Forma [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Maximum Stock Compensation Costs			$ 26,400,000
PSUs [Member] \| Executive Officer [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares) \| shares				172,000		252,000		220,000
PSUs [Member] \| Non-Executive Employees [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares) \| shares				58,000	61,000			91,000
Executive 2015 PSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Share Based Payment Other Than Options Percentage Allowed				300.00%
Executive 2015 PSUs [Member] \| Executive Officer [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				2 years
Executive 2015 PSUs [Member] \| Pro Forma [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Maximum Stock Compensation Costs				$ 25,000,000
Non-executive 2015 PSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				2 years
Non-executive 2015 PSUs [Member] \| Pro Forma [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Maximum Stock Compensation Costs				$ 7,000,000
2014 Executive PSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period						2 years
Share Based Compensation Share Based Payment Other Than Options Percentage Allowed						300.00%
2014 Executive PSUs [Member] \| Subsequent Event [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Total PSU Earned (in Shares) \| shares	694,000
Actual Stock Compensation Costs	$ 21,900,000
2014 Non-Executive PSU's [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					2 years
2014 Non-Executive PSU's [Member] \| Subsequent Event [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Total PSU Earned (in Shares) \| shares	103,000
Actual Stock Compensation Costs		$ 3,800,000
2013 MSUs [Member] \| Executive Officers and Non-Executive Employees [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares) \| shares							360,000
2013 Executive MSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share Price (in Dollars per share) \| $ / shares							$ 31.73					$ 31.73
Share Based Compensation Share Based Payment Other Than Options Percentage Allowed							500.00%
Share-based Compensation Arrangement by Share-based Payment Award, Individual Stock Price Targets							5
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate							38.70%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate							1.60%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate							0.00%
Actual Stock Compensation Costs							$ 42,400,000
Total MSU Earned (in Shares) \| shares													1,800,000
2013 Executive PSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period								2 years
Share Based Compensation Share Based Payment Other Than Options Percentage Allowed								300.00%
Total PSU Earned (in Shares) \| shares								622,000
Actual Stock Compensation Costs								$ 15,500,000
2013 Non-Executive PSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period								2 years
Total PSU Earned (in Shares) \| shares								154,000
Actual Stock Compensation Costs								$ 3,000,000
2004 Plan [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Percent Increases In Period									5.00%
Share-based Compensation Arrangement by Share-based Payment Award Automatic Increase Shares (in Shares) \| shares									2,400,000
Expired Shares Under Plan (in Shares) \| shares									2,900,000
2014 Plan [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) \| shares														5,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares) \| shares			4,700,000							4,700,000
2004 Employee Stock Purchase Plan [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Percent Increases In Period										2.00%
Share-based Compensation Arrangement by Share-based Payment Award Automatic Increase Shares (in Shares) \| shares										1,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares) \| shares			4,700,000							4,700,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized			$ 78,000							$ 78,000
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee (in Shares) \| shares										2,000
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee, Value										$ 25,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in Shares) \| shares										56,000	78,000	111,000
Stock Issued During Period Shares Employee Stock Purchase Plans Intrinsic Value										$ 600,000	$ 900,000	$ 800,000
Proceeds from Stock Plans										$ 2,200,000	$ 2,100,000	$ 2,100,000
Share-based Compensation Award Tranche One [Member] \| MPSUs 2015 [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Individual Stock Price Targets			5
Share-based Compensation Award Tranche One [Member] \| MPSUs 2015 [Member] \| Pro Forma [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			4 years
Maximum Stock Compensation Costs			$ 9,200,000
Share-based Compensation Award Tranche One [Member] \| Executive 2015 PSUs [Member] \| Vesting in First Quarter 2017 [Member] \| Executive Officer [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage				50.00%
Share-based Compensation Award Tranche One [Member] \| Non-executive 2015 PSUs [Member] \| Vesting in First Quarter 2017 [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage				50.00%
Share-based Compensation Award Tranche One [Member] \| 2014 Executive PSUs [Member] \| Vesting in the First Quarter of 2016 [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage						50.00%
Share-based Compensation Award Tranche One [Member] \| 2014 Non-Executive PSU's [Member] \| Vesting in the Second Quarter of 2016 [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage					50.00%
Share-based Compensation Award Tranche One [Member] \| 2013 Executive PSUs [Member] \| Vesting in the First Quarter of 2015 [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage								50.00%
Share-based Compensation Award Tranche One [Member] \| 2013 Non-Executive PSUs [Member] \| Vesting in the First Quarter of 2015 [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage								50.00%
Second, Third, and Fourth Tranches [Member] \| MPSUs 2015 [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Individual Stock Price Targets			5
Share-based Compensation Arrangement by Share-based Payment Awards, Number of Perfomance Conditions to Meet			1
Share-based Compensation Award Tranche Two [Member] \| MPSUs 2015 [Member] \| Pro Forma [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Maximum Stock Compensation Costs			$ 4,600,000
Share-based Compensation Award, Tranche Three [Member] \| MPSUs 2015 [Member] \| Pro Forma [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Maximum Stock Compensation Costs			5,300,000
Share-based Compensation Award, Tranche Four [Member] \| MPSUs 2015 [Member] \| Pro Forma [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Maximum Stock Compensation Costs			7,300,000
Minimum [Member] \| Time-Based RSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period												1 year
Minimum [Member] \| Non-executive 2015 PSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Share Based Payment Other Than Options Percentage Allowed				200.00%
Minimum [Member] \| 2014 Non-Executive PSU's [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Share Based Payment Other Than Options Percentage Allowed					200.00%
Minimum [Member] \| 2013 MSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Market Awards Price Targets							40.00
Minimum [Member] \| 2013 Non-Executive PSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Share Based Payment Other Than Options Percentage Allowed								200.00%
Minimum [Member] \| Share-based Compensation Award Tranche One [Member] \| MPSUs 2015 [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Market Awards Price Targets			$ 71.36
Minimum [Member] \| Second, Third, and Fourth Tranches [Member] \| MPSUs 2015 [Member] \| Pro Forma [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			1 year
Maximum [Member] \| Time-Based RSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period												4 years
Maximum [Member] \| Non-executive 2015 PSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Share Based Payment Other Than Options Percentage Allowed				300.00%
Maximum [Member] \| 2014 Non-Executive PSU's [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Share Based Payment Other Than Options Percentage Allowed					300.00%
Maximum [Member] \| 2013 Executive MSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Market Awards Price Targets							$ 56.00
Maximum [Member] \| 2013 Non-Executive PSUs [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Share Based Compensation Share Based Payment Other Than Options Percentage Allowed								300.00%
Maximum [Member] \| Share-based Compensation Award Tranche One [Member] \| MPSUs 2015 [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Market Awards Price Targets			$ 95.57
Maximum [Member] \| Second, Third, and Fourth Tranches [Member] \| MPSUs 2015 [Member] \| Pro Forma [Member]
Note 7 - Stock-Based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			4 years