Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments (Details Textual)

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Derivative Instruments (Details Textual) (USD $)
In Millions, unless otherwise specified
3 Months Ended
May 31, 2012
Apr. 30, 2012
Feb. 29, 2012
Derivative Instruments (Textual)      
Maturity of foreign currency contracts generally less than 12 months    
Notional value of undesignated foreign currency contracts outstanding $ 198.6   $ 148.6
Notional value of undesignated interest rate swap agreements 1,000.0 500.0  
Average maturity period of cash flow hedges three years or less    
Maximum maturity period of cash flow hedges five years    
Notional value of cash flow designated foreign currency contracts outstanding 346.5   353.7
Interest rate swap agreements designated as cash flow hedges 500.0 500.0 500.0
Amount of net losses, net of income tax effect, to be reclassified from AOCI to earnings within the next 12 months 6.4    
Fair value of derivative instruments in a net liability position due to counterparties 54.0    
Fair value of derivative instruments in a net receivable position due from counterparties $ 5.8