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
May 31, 2012
May 31, 2011
Basic and diluted earnings per common share    
Income available to common stockholders $ 72.0 $ 74.5
Class A Common Stock [Member]
    
Weighted average common shares outstanding - basic:    
Weighted average common shares outstanding - basic 162,259,000 187,046,000
Weighted average common shares outstanding - diluted    
Weighted average common shares outstanding - basic 162,259,000 187,046,000
Stock-based awards, primarily stock options 4,448,000 4,264,000
Weighted average common shares outstanding - diluted 190,261,000 214,914,000
Earnings per common share - basic:    
Earnings per common share - basic $ 0.39 $ 0.36
Earnings per common share - diluted:    
Earnings per common share - diluted $ 0.38 $ 0.35
Earnings Per Common Share (Textual)    
Antidilutive shares not included in computation of earnings per common share 9,800,000 8,700,000
Class B Convertible Common Stock [Member]
    
Weighted average common shares outstanding - basic:    
Weighted average common shares outstanding - basic 23,554,000 23,604,000
Weighted average common shares outstanding - diluted    
Weighted average common shares outstanding - basic 23,554,000 23,604,000
Weighted average common shares outstanding - diluted 23,554,000 23,604,000
Earnings per common share - basic:    
Earnings per common share - basic $ 0.36 $ 0.32
Earnings per common share - diluted:    
Earnings per common share - diluted $ 0.35 $ 0.32