Stock And Stock-Based Incentive Plans (Stock Option Activity) (Details) (Stock Option [Member], USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
Nov. 30, 2014	Nov. 30, 2013
Stock Option [Member]
Outstanding as of February 28, 2014, Number of Shares	10,018,000
Options granted, Number of Shares	2,050,919	1,605,149
Options exercised, Number of Shares	(3,035,000)
Options forfeited or expired, Number of Shares	(34,000)
Outstanding as of November 30, 2014, Number of Shares	9,000,000
Exercisable as of November 30, 2014, Number of Shares	4,771,000
Outstanding as of February 28, 2014, Weighted Average Exercise Price	$ 27.02
Options granted, Weighted Average Exercise Price	$ 45.02
Options exercised, Weighted Average Exercise Price	$ 17.89
Options forfeited or expired, Weighted Average Exercise Price	$ 36.95
Outstanding as of November 30, 2014, Weighted Average Exercise Price	$ 34.17
Exercisable as of November 30, 2014, Weighted Average Exercise Price	$ 28.47
Outstanding as of November 30, 2014, Weighted Average Remaining Contractual Life (Years)	4 years 2 months 12 days
Exercisable as of November 30, 2014, Weighted Average Remaining Contractual Life (Years)	3 years 1 month 6 days
Outstanding as of November 30, 2014, Aggregate Intrinsic Value	$ 205,337
Exercisable as of November 30, 2014, Aggregate Intrinsic Value	$ 136,009

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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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.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

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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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- Definition

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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- Definition

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.

+ References

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-Publisher FASB

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- Definition

Weighted average price of options that were either forfeited or expired.

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-Publisher FASB

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- Definition

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

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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

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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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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

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

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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