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Financial Instruments (Carrying Amount And Fair Value Of Financial Instruments) (Details) (USD $) In Millions, unless otherwise specified	Nov. 30, 2012	Nov. 30, 2011
Derivative [Line Items]
Long-term investments, Carrying amount	$ 86.1	$ 71.4
Long-term investments, Fair value	86.1	71.4
Long-term debt, Carrying amount	1,031.5	1,035.1
Long-term debt, Fair value	$ 1,168.5	$ 1,136.6

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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