Annual report pursuant to Section 13 and 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 12 Months Ended
Feb. 28, 2013
Nov. 30, 2012
Aug. 31, 2012
May 31, 2012
Feb. 29, 2012
Nov. 30, 2011
Aug. 31, 2011
May 31, 2011
Feb. 28, 2013
Feb. 29, 2012
Feb. 28, 2011
Basic and diluted earnings per common share                      
Income available to common stockholders $ 81.7 $ 109.5 $ 124.6 $ 72.0 $ 103.0 $ 104.8 $ 162.7 $ 74.5 $ 387.8 $ 445.0 $ 559.5
Class A Common Stock [Member]
                      
Weighted average common shares outstanding – basic:                      
Weighted average common shares outstanding - basic                 158,658,000 180,724,000 187,224,000
Weighted average common shares outstanding – diluted:                      
Weighted average common shares outstanding - basic                 158,658,000 180,724,000 187,224,000
Stock-based awards, primarily stock options                 8,117,000 4,341,000 2,855,000
Weighted average common shares outstanding - diluted                 190,307,000 208,655,000 213,765,000
Earnings per common share – basic:                      
Earnings per common share - basic (in dollars per share) $ 0.45 $ 0.61 $ 0.71 $ 0.39 $ 0.53 $ 0.53 $ 0.78 $ 0.36 $ 2.15 $ 2.20 $ 2.68
Earnings per common share – diluted:                      
Earnings per common share - diluted (in dollars per share) $ 0.43 $ 0.58 $ 0.67 $ 0.38 $ 0.51 $ 0.52 $ 0.76 $ 0.35 $ 2.04 $ 2.13 $ 2.62
Earnings Per Common Share (Textual)                      
Antidilutive shares not included in computation of earnings per common share                 300,000 8,900,000 20,700,000
Class B Convertible Common Stock [Member]
                      
Weighted average common shares outstanding – basic:                      
Weighted average common shares outstanding - basic                 23,532,000 23,590,000 23,686,000
Weighted average common shares outstanding – diluted:                      
Weighted average common shares outstanding - basic                 23,532,000 23,590,000 23,686,000
Weighted average common shares outstanding - diluted                 23,532,000 23,590,000 23,686,000
Earnings per common share – basic:                      
Earnings per common share - basic (in dollars per share) $ 0.41 $ 0.55 $ 0.64 $ 0.36 $ 0.48 $ 0.48 $ 0.71 $ 0.32 $ 1.96 $ 2.00 $ 2.44
Earnings per common share – diluted:                      
Earnings per common share - diluted (in dollars per share) $ 0.39 $ 0.53 $ 0.62 $ 0.35 $ 0.47 $ 0.47 $ 0.70 $ 0.32 $ 1.87 $ 1.96 $ 2.40