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Stock And Stock-Based Incentive Plans (Narrative) (Details) (USD $) | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended
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Feb. 28, 2014 FY 2013 Share Repurchase Authorizations Member | Feb. 28, 2014 FY 2015 Share Repurchase Authorization Member | Feb. 28, 2014 Preferred Stock [Member] | Feb. 28, 2014 Preferred Stock [Member] Preferred Series A [Member] | Feb. 28, 2014 Share Repurchase Program [Member] FY 2013 Share Repurchase Authorizations Member | Feb. 28, 2013 Share Repurchase Program [Member] FY 2013 Share Repurchase Authorizations Member | Feb. 28, 2014 Share Repurchase Program [Member] October 2012 Authorization [Member] | Feb. 28, 2014 Share Repurchase Program [Member] January 2013 Authorization [Member] | Feb. 28, 2014 Stock Compensation Plan [Member] | Feb. 28, 2013 Stock Compensation Plan [Member] | Feb. 29, 2012 Stock Compensation Plan [Member] | Feb. 28, 2014 Stock Option [Member] | Feb. 28, 2013 Stock Option [Member] | Feb. 29, 2012 Stock Option [Member] | Feb. 28, 2014 Stock Option [Member] Minimum [Member] | Feb. 28, 2014 Stock Option [Member] Maximum [Member] | Feb. 28, 2014 Cash-Settled Restricted Stock Units [Member] | Feb. 28, 2013 Cash-Settled Restricted Stock Units [Member] | Feb. 29, 2012 Cash-Settled Restricted Stock Units [Member] | Feb. 28, 2014 Cash-Settled Restricted Stock Units [Member] Minimum [Member] | Feb. 28, 2014 Cash-Settled Restricted Stock Units [Member] Maximum [Member] | Feb. 28, 2014 Stock-Settled Restricted Stock Units [Member] | Feb. 28, 2013 Stock-Settled Restricted Stock Units [Member] | Feb. 29, 2012 Stock-Settled Restricted Stock Units [Member] | Feb. 28, 2014 Stock-Settled Restricted Stock Units [Member] Minimum [Member] | Feb. 28, 2014 Stock-Settled Restricted Stock Units [Member] Maximum [Member] | Feb. 28, 2013 Restricted Stock [Member] | Feb. 29, 2012 Restricted Stock [Member] | Feb. 28, 2011 Restricted Stock [Member] | Feb. 28, 2014 Restricted Stock [Member] | Feb. 28, 2014 Restricted Stock [Member] Minimum [Member] | Feb. 28, 2014 Employee Stock Purchase Plan [Member] | Feb. 28, 2013 Employee Stock Purchase Plan [Member] | Feb. 29, 2012 Employee Stock Purchase Plan [Member] | Feb. 28, 2014 Employee Stock Purchase Plan [Member] Maximum [Member]
Stock and Stock-Based Incentive Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase, authorized amount | $ 800,000,000 | $ 1,000,000,000 |  |  | $ 800,000,000 |  | $ 300,000,000 | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase, authorization expiration |  | Dec. 31, 2015 |  |  |  |  | Dec. 31, 2013 | Dec. 31, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares repurchased during the period |  |  |  |  | 6,859,518 | 5,762,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase, average purchase price per share |  |  |  |  | $ 44.61 | $ 36.77 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase, amount remaining for repurchase |  |  |  |  | 282,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized |  |  |  |  |  |  |  |  | 50,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,000,000 |  |  |
Vesting period, in years |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year | 4 years | 3 years |  |  |  |  | 3 years |  |  |  |  |  |  |  |  | 3 years |  |  |  |
Years until expiration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash payment per RSU, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 75.00% | 200.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
MSUs converted to common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 2 |  |  |  |  |  |  |  |  |
Conversion ratio, number of final trading days in vesting period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40 days |  |  |  |  |  |  |  |  |  |  |  |  |
Stock units granted, number of units or shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 541,819 | 644,232 | 575,380 |  |  | 237,660 | 348,551 | 299,102 |  |  | 0 | 0 | 0 |  |  |  |  |  |
Tax benefit related to the vesting of options |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,900,000 |  |  |  |  |  |  |  |
Stock units granted, weighted average grant date fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 42.68 | $ 31.76 | $ 32.69 |  |  | $ 52.02 | $ 40.33 | $ 45.48 |  |  |  |  |  |  |  |  |  |  |
Options granted, Number of Shares |  |  |  |  |  |  |  |  |  |  |  | 1,605,149 | 2,252,124 | 1,993,498 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized share-based compensation |  |  |  |  |  |  |  |  | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash received as a result of stock option exercises |  |  |  |  |  |  |  |  |  |  |  | 45,100,000 | 71,700,000 | 25,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total intrinsic value of options exercised |  |  |  |  |  |  |  |  |  |  |  | 62,500,000 | 68,000,000 | 23,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related tax benefits |  |  |  |  |  |  |  |  |  |  |  | 25,100,000 | 27,200,000 | 9,500,000 |  |  | 9,300,000 |  |  |  |  | 7,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Options granted, weighted average grant date fair value |  |  |  |  |  |  |  |  |  |  |  | $ 15.59 | $ 12.67 | $ 13.80 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation costs related to nonvested options/MSUs |  |  |  |  |  |  |  |  |  |  |  | 32,600,000 |  |  |  |  |  |  |  |  |  | 13,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average period, years |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |
Payment related to restricted stock units vested during the period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred shares authorized |  |  |  | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Shares Outstanding |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common shares reserved for future grants |  |  |  |  |  |  |  |  | 10,637,303 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Awards outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,531,000 | 1,651,000 |  |  |  | 852,000 | 904,000 |  |  |  |  |  |  | 0 |  |  |  |  |
Associate contribution limit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |  |
Associate contribution limit, value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,500
Company match |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.15 |  |  |
Shares remained available under the purchase plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,724,673 |  |  |
Shares purchased on the open market |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 188,797 | 251,667 | 260,927 |
Average price per share under purchases plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 47.35 | $ 32.05 | $ 30.02 |

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- Definition 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. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period. + 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 (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition 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). + 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The highest percentage of annual salary that an employee is permitted to utilize with respect to the 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 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + 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)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average of per share prices paid for shares purchased on the open market for issuance to employees under the 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 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 + Details
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- Definition The number of shares purchased on the open market during the period for issuance to employees under the 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 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 + Details
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- Definition Amount of a stock repurchase plan authorized by an entity's Board of Directors. + References No definition available. + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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