Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Common Share (Details)

v2.4.0.8
Earnings Per Common Share (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Nov. 30, 2013
Nov. 30, 2012
Nov. 30, 2013
Nov. 30, 2012
Basic and diluted earnings per common share        
Income available to common stockholders $ 211.0 $ 109.5 $ 1,785.9 $ 306.1
Class A Common Stock [Member]
        
Weighted average common shares outstanding - basic:        
Weighted average common shares outstanding - basic 165,708,000 158,270,000 164,082,000 158,442,000
Weighted average common shares outstanding - diluted        
Weighted average common shares outstanding - basic 165,708,000 158,270,000 164,082,000 158,442,000
Stock-based awards, primarily stock options 8,913,000 7,902,000 9,327,000 6,662,000
Weighted average common shares outstanding - diluted 198,082,000 189,696,000 196,886,000 188,642,000
Earnings per common share - basic:        
Earnings per common share - basic $ 1.13 $ 0.61 $ 9.63 $ 1.70
Earnings per common share - diluted:        
Earnings per common share - diluted $ 1.07 $ 0.58 $ 9.07 $ 1.62
Earnings Per Common Share (Textual)        
Antidilutive shares not included in computation of earnings per common share     1,300,000 2,200,000
Class B Convertible Common Stock [Member]
        
Weighted average common shares outstanding - basic:        
Weighted average common shares outstanding - basic 23,461,000 23,524,000 23,477,000 23,538,000
Weighted average common shares outstanding - diluted        
Weighted average common shares outstanding - basic 23,461,000 23,524,000 23,477,000 23,538,000
Weighted average common shares outstanding - diluted 23,461,000 23,524,000 23,477,000 23,538,000
Earnings per common share - basic:        
Earnings per common share - basic $ 1.03 $ 0.55 $ 8.76 $ 1.55
Earnings per common share - diluted:        
Earnings per common share - diluted $ 0.98 $ 0.53 $ 8.34 $ 1.49