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Subsequent Events	6 Months Ended
Subsequent Events	May 31, 2013
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In June 2013, we announced the adoption of a Rule 10b5-1 share repurchase plan for the purpose of repurchasing up to $100 million of our common stock as part of our previously announced repurchase authorization, which the Board of Directors increased by $10 million to $360 million. The plan will be active from July 1, 2013 until December 31, 2013 or, if earlier, upon the repurchase of $100 million of our common stock under the plan. We previously utilized a Rule 10b5-1 plan to repurchase $250 million of our common stock between October 2012 and May 2013.