v2.4.0.6
Stock and Stock-Based Incentive Plans (Stock Option Activity) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 9 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Stock and Stock-Based Incentive Plans [Abstract]    
Outstanding as of February 29, 2012, Number of Shares 12,578,000  
Options granted, Number of Shares 2,252,124 1,933,690
Options exercised, Number of Shares (2,309,000)  
Options forfeited or expired, Number of Shares (37,000)  
Outstanding as of November 30, 2012, Number of Shares 12,484,000  
Exercisable as of November 30, 2012, Number of Shares 7,719,000  
Outstanding as of February 29, 2012, Weighted Average Exercise Price $ 19.84  
Options granted, Weighted Average Exercise Price $ 31.58  
Options exercised, Weighted Average Exercise Price $ 16.39  
Options forfeited or expired, Weighted Average Exercise Price $ 25.76  
Outstanding as of November 30, 2012, Weighted Average Exercise Price $ 22.58  
Exercisable as of November 30, 2012, Weighted Average Exercise Price $ 19.00  
Outstanding as of November 30, 2012, Weighted Average Remaining Contractual Life (Years) 3 years 9 months 18 days  
Exercisable as of November 30, 2012, Weighted Average Remaining Contractual Life (Years) 2 years 9 months 18 days  
Outstanding as of November 30, 2012, Aggregate Intrinsic Value $ 170,793  
Exercisable as of November 30, 2012, Aggregate Intrinsic Value $ 133,205