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Derivative Instruments and Hedging Activities - Additional Information (Detail)
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Feb. 28, 2014
USD ($)
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May 31, 2013
USD ($)
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Feb. 28, 2014
Other Accrued Expenses [Member]
USD ($)
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Feb. 28, 2014
Swap agreements [Member]
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May 31, 2013
Swap agreements [Member]
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Feb. 28, 2014
Short-term [Member]
USD ($)
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May 31, 2013
Short-term [Member]
USD ($)
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Feb. 28, 2014
Long-term [Member]
USD ($)
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May 31, 2013
Long-term [Member]
USD ($)
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Feb. 28, 2014
Credit valuation adjustment [Member]
USD ($)
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May 31, 2013
Credit valuation adjustment [Member]
USD ($)
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Sep. 10, 2013
Euro term loan [Member]
USD ($)
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Sep. 25, 2007
Euro term loan [Member]
USD ($)
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Sep. 25, 2007
Euro term loan [Member]
EUR (€)
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Feb. 28, 2014
U.S. dollar term loan [Member]
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Derivative Instruments And Hedging Activities [Line Items] | |||||||||||||||
| Hedged portion of net investment | $ 1,355,000,000 | $ 0 | $ 1,207,400,000 | € 875,000,000 | |||||||||||
| Hedged portion of net investment, as a percentage | 44.13% | ||||||||||||||
| Swap liability | 22,400,000 | 54,100,000 | 10,000,000 | 19,900,000 | 12,600,000 | 34,800,000 | (200,000) | (600,000) | |||||||
| Effective interest rate | 3.63% | ||||||||||||||
| Term loan fixed interest rate | 5.07% | ||||||||||||||
| Effective weighted average interest rate on all outstanding debt, including the interest rate swaps | 5.38% | 6.29% | |||||||||||||
| Derivatives not designated as hedging instruments on a gross basis assets | $ 900,000 | $ 100,000 |