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Description of Business, Basis of Presentation and Summary of Significant Accounting Policies (Details Textual 1) (USD $)
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12 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Feb. 28, 2014
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Feb. 28, 2013
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Feb. 28, 2013
Commodity swap contracts [Member]
Unusual Items [Member]
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Feb. 29, 2012
Commodity swap contracts [Member]
Unusual Items [Member]
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Feb. 28, 2014
Not designated as hedging instrument [Member]
Foreign currency contracts [Member]
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Feb. 28, 2013
Not designated as hedging instrument [Member]
Foreign currency contracts [Member]
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Feb. 28, 2014
Not designated as hedging instrument [Member]
Commodity swap contracts [Member]
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Feb. 28, 2013
Not designated as hedging instrument [Member]
Commodity swap contracts [Member]
|
Feb. 28, 2014
Not designated as hedging instrument [Member]
Interest rate swap contracts [Member]
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Feb. 28, 2013
Not designated as hedging instrument [Member]
Interest rate swap contracts [Member]
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Apr. 30, 2012
Not designated as hedging instrument [Member]
Interest rate swap contracts [Member]
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Feb. 28, 2014
Designated as hedging instrument [Member]
Cash flow hedging [Member]
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Feb. 28, 2014
Designated as hedging instrument [Member]
Foreign currency contracts [Member]
Cash flow hedging [Member]
|
Feb. 28, 2013
Designated as hedging instrument [Member]
Foreign currency contracts [Member]
Cash flow hedging [Member]
|
Feb. 28, 2014
Designated as hedging instrument [Member]
Commodity swap contracts [Member]
Cash flow hedging [Member]
|
Feb. 28, 2013
Designated as hedging instrument [Member]
Commodity swap contracts [Member]
Cash flow hedging [Member]
|
Feb. 28, 2014
Designated as hedging instrument [Member]
Interest rate swap contracts [Member]
Cash flow hedging [Member]
|
Feb. 28, 2013
Designated as hedging instrument [Member]
Interest rate swap contracts [Member]
Cash flow hedging [Member]
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Apr. 30, 2012
Designated as hedging instrument [Member]
Interest rate swap contracts [Member]
Cash flow hedging [Member]
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Sep. 02, 2011
Designated as hedging instrument [Member]
Interest rate swap contracts [Member]
Cash flow hedging [Member]
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Jun. 30, 2010
Designated as hedging instrument [Member]
Interest rate swap contracts [Member]
Cash flow hedging [Member]
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| Derivative [Line Items] | |||||||||||||||||||||
| Maturity of derivative instruments | 12 months | 36 months | |||||||||||||||||||
| Net gain (loss) on commodity swap contracts reported outside of segment operating results | $ (2,100,000) | $ (4,300,000) | $ 0 | $ 0 | |||||||||||||||||
| Notional value of derivative instruments | 643,800,000 | 355,100,000 | 88,000,000 | 0 | 1,000,000,000 | 1,000,000,000.0 | 500,000,000 | 636,600,000 | 220,300,000 | 0 | 17,400,000 | 500,000,000 | 500,000,000.0 | 500,000,000 | 500,000,000.0 | 500,000,000.0 | |||||
| Average maturity period for cash flow hedges | 3 years | ||||||||||||||||||||
| Maximum maturity period for cash flow hedges | 5 years | ||||||||||||||||||||
| Amount of net losses, net of income tax effect, to be reclassified from AOCI to earnings within the next 12 months | 3,100,000 | ||||||||||||||||||||
| Fair value of derivative instruments in a net liability position due to counterparties | 30,400,000 | ||||||||||||||||||||
| Fair value of derivative instruments in a net receivable position due from counterparties | $ 17,000,000 | ||||||||||||||||||||