Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Common Share (Details)

v2.4.0.6
Earnings Per Common Share (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Aug. 31, 2012
Aug. 31, 2011
Aug. 31, 2012
Aug. 31, 2011
Basic and diluted earnings per common share        
Income available to common stockholders $ 124.6 $ 162.7 $ 196.6 $ 237.2
Class A Common Stock [Member]
        
Weighted average common shares outstanding - basic:        
Weighted average common shares outstanding - basic 154,794,000 186,629,000 158,527,000 186,837,000
Weighted average common shares outstanding - diluted        
Weighted average common shares outstanding - basic 154,794,000 186,629,000 158,527,000 186,837,000
Stock-based awards, primarily stock options 6,310,000 3,423,000 5,386,000 3,970,000
Weighted average common shares outstanding - diluted 184,640,000 213,645,000 187,458,000 214,406,000
Earnings per common share - basic:        
Earnings per common share - basic $ 0.71 $ 0.78 $ 1.09 $ 1.14
Earnings per common share - diluted:        
Earnings per common share - diluted $ 0.67 $ 0.76 $ 1.05 $ 1.11
Earnings Per Common Share (Textual)        
Antidilutive shares not included in computation of earnings per common share 3,200,000 9,100,000 3,600,000 9,000,000
Class B Convertible Common Stock [Member]
        
Weighted average common shares outstanding - basic:        
Weighted average common shares outstanding - basic 23,536,000 23,593,000 23,545,000 23,599,000
Weighted average common shares outstanding - diluted        
Weighted average common shares outstanding - basic 23,536,000 23,593,000 23,545,000 23,599,000
Weighted average common shares outstanding - diluted 23,536,000 23,593,000 23,545,000 23,599,000
Earnings per common share - basic:        
Earnings per common share - basic $ 0.64 $ 0.71 $ 0.99 $ 1.04
Earnings per common share - diluted:        
Earnings per common share - diluted $ 0.62 $ 0.70 $ 0.96 $ 1.02