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Employee Benefit And Retirement Plans (Change In Fair Value Of Level 3 Pension Plan Assets) (Details) (USD $) In Millions, unless otherwise specified				12 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2010	Nov. 30, 2012 Level 3 [Member]	Nov. 30, 2011 Level 3 [Member]	Nov. 30, 2012 Level 3 [Member] Hedge Fund Of Funds [Member]	Nov. 30, 2011 Level 3 [Member] Hedge Fund Of Funds [Member]	Nov. 30, 2012 Level 3 [Member] Private Equity Funds [Member]	Nov. 30, 2011 Level 3 [Member] Private Equity Funds [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	$ 0	$ 0	$ 0	$ 24.6	$ 22.1	$ 19.8	$ 18.9	$ 4.8	$ 3.2
Realized gains				0.1	0.8	0	0.6	0.1	0.2
Unrealized gains				0.7	0.2	0.6	(0.3)	0.1	0.5
Net, purchases and sales				1.0	1.5	0.7	0.6	0.3	0.9
Fair value of plan assets at end of year	$ 0	$ 0	$ 0	$ 26.4	$ 24.6	$ 21.1	$ 19.8	$ 5.3	$ 4.8

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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