Retirement Benefits - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Feb. 28, 2014	Nov. 30, 2013
Compensation And Retirement Disclosure [Abstract]
Defined benefit pension plan assets, total		$ 1,258.4
Projected benefit obligations, total		1,538.6
Unfunded pension obligation	257.2	261.7
Percentage of unfunded pension benefit obligation for tax-qualified pension plan		91.00%
Accumulated prepayment credits		$ 30.6

This represents the noncurrent liability recognized in the balance sheet that is associated with the defined benefit pension plans.

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