Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments (Details Textual)

v2.4.0.6
Derivative Instruments (Details Textual) (USD $)
 9 Months Ended
Nov. 30, 2012
Apr. 30, 2012
Feb. 29, 2012
Derivative [Line Items]      
Notional value of undesignated foreign currency contracts outstanding $ 274,000,000   $ 148,600,000
Notional value of undesignated interest rate swap agreements 1,000,000,000 500,000,000 0
Notional value of cash flow designated foreign currency contracts outstanding 213,500,000   353,700,000
Notional value of cash flow designated interest rate swap agreements outstanding 500,000,000 500,000,000 500,000,000
Notional value of cash flow designated diesel fuel swap contracts outstanding 18,300,000   0
Amount of net losses, net of income tax effect, to be reclassified from AOCI to earnings within the next 12 months (5,900,000)    
Fair value of derivative instruments in a net liability position due to counterparties 49,200,000    
Fair value of derivative instruments in a net receivable position due from counterparties $ 7,400,000    
Not Designated as Hedging Instrument [Member]
      
Derivative [Line Items]      
Maturity of foreign currency contracts 12 months    
Designated as Hedging Instrument [Member]
      
Derivative [Line Items]      
Average maturity period of cash flow hedges 3 years    
Maximum maturity period of cash flow hedges 5 years