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Subsequent Event
 6 Months Ended
May. 31, 2015
Subsequent Events [Abstract]  
Subsequent Event
Subsequent Event
On June 15, 2015, we repaid, at maturity, the remaining $199.9 million in aggregate principal amount of our 6 1/4% Senior Notes due 2015 using a portion of the net proceeds from our 2015 first quarter issuance of the 7.625% Senior Notes due 2023.