Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Financial Information (Unaudited) (Details)

v2.4.0.6
Selected Quarterly Financial Information (Unaudited) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Feb. 29, 2012
Nov. 30, 2011
Aug. 31, 2011
May 31, 2011
Feb. 28, 2011
Nov. 30, 2010
Aug. 31, 2010
May 31, 2010
Feb. 29, 2012
Feb. 28, 2011
Feb. 28, 2010
Summary of selected quarterly financial information                      
Net sales $ 628.1 $ 700.7 $ 690.2 $ 635.3 $ 715.3 $ 966.4 $ 862.8 $ 787.5 $ 2,654.3 $ 3,332.0 $ 3,364.8
Gross profit 245.2 282.9 283.0 251.0 254.0 351.9 314.2 270.0 1,062.1 1,190.1 1,144.8
Net income $ 103.0 $ 104.8 $ 162.7 $ 74.5 $ 279.8 $ 139.3 $ 91.3 $ 49.1 $ 445.0 $ 559.5 $ 99.3
Class A Common Stock [Member]
                     
Earnings per common share:                      
Earnings per common share, basic $ 0.53 $ 0.53 $ 0.78 $ 0.36 $ 1.36 $ 0.67 $ 0.44 $ 0.23 $ 2.20 $ 2.68 $ 0.46
Earnings per common share, diluted $ 0.51 $ 0.52 $ 0.76 $ 0.35 $ 1.32 $ 0.65 $ 0.43 $ 0.22 $ 2.13 $ 2.62 $ 0.45
Class B Convertible Common Stock [Member]
                     
Earnings per common share:                      
Earnings per common share, basic $ 0.48 $ 0.48 $ 0.71 $ 0.32 $ 1.24 $ 0.61 $ 0.40 $ 0.21 $ 2.00 $ 2.44 $ 0.41
Earnings per common share, diluted $ 0.47 $ 0.47 $ 0.70 $ 0.32 $ 1.21 $ 0.60 $ 0.40 $ 0.21 $ 1.96 $ 2.40 $ 0.41