Stock and Stock-Based Incentive Plans (Outstanding Stock Options) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
Nov. 30, 2012	Feb. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares	12,484
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	3 years 9 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 22.58	$ 19.84
Options Exercisable, Number of Shares	7,719
Options Exercisable, Weighted Average Exercise Price	$ 19.00
$7.14 To $10.75 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares	128
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	4 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 7.18
Options Exercisable, Number of Shares	128
Options Exercisable, Weighted Average Exercise Price	$ 7.18
Range of Exercise Prices, lower range	$ 7.14
Range of Exercise Prices, upper range	$ 10.75
$11.43 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares	1,958
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	3 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 11.43
Options Exercisable, Number of Shares	1,382
Options Exercisable, Weighted Average Exercise Price	$ 11.43
Range of Exercise Prices, lower range	$ 11.43
$13.19 To $14.81
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares	1,875
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	2 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price	$ 13.83
Options Exercisable, Number of Shares	1,875
Options Exercisable, Weighted Average Exercise Price	$ 13.83
Range of Exercise Prices, lower range	$ 13.19
Range of Exercise Prices, upper range	$ 14.81
$14.86 To $19.82 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares	1,819
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	2 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price	$ 19.22
Options Exercisable, Number of Shares	1,819
Options Exercisable, Weighted Average Exercise Price	$ 19.22
Range of Exercise Prices, lower range	$ 14.86
Range of Exercise Prices, upper range	$ 19.82
$19.98 To $25.12 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares	854
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	1 year 10 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 24.68
Options Exercisable, Number of Shares	782
Options Exercisable, Weighted Average Exercise Price	$ 24.75
Range of Exercise Prices, lower range	$ 19.98
Range of Exercise Prices, upper range	$ 25.12
$25.39 To $30.24 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares	1,780
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	4 years 3 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 25.60
Options Exercisable, Number of Shares	934
Options Exercisable, Weighted Average Exercise Price	$ 25.41
Range of Exercise Prices, lower range	$ 25.39
Range of Exercise Prices, upper range	$ 30.24
$31.76 To $32.05 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares	2,186
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	6 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 31.76
Options Exercisable, Number of Shares	146
Options Exercisable, Weighted Average Exercise Price	$ 31.77
Range of Exercise Prices, lower range	$ 31.76
Range of Exercise Prices, upper range	$ 32.05
$32.69 To $33.11 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number of Shares	1,884
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	5 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 32.70
Options Exercisable, Number of Shares	653
Options Exercisable, Weighted Average Exercise Price	$ 32.70
Range of Exercise Prices, lower range	$ 32.69
Range of Exercise Prices, upper range	$ 33.11

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

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- Definition

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

+ References

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph A240

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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