Employee Benefit and Stock Plans (Details) (USD $)	12 Months Ended
	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based payments award terms of Award	5 years	5 years	5 years
Stock option transactions
Options outstanding at beginning of year, Options	10,531,938	10,105,546	10,160,396
Options outstanding at beginning of year, Weighted Average Exercise Price in dollars per share	$ 21.11	$ 21.27	$ 21.27
Granted, Options	1,273,647	550,000	30,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price in dollars per share	$ 14.62	$ 16.63	$ 9.08
Employee stock options/other, Shares	(36,665)	(118,208)	(7,494)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price in dollars per share	$ 7.92	$ 13.46	$ 13.93
Cancelled, Options	(33,878)	(5,400)	(77,356)
Cancelled, Weighted Average Exercise Price in dollars per share	$ 20.25	$ 24.24	$ 17.96
Options outstanding at end of year, Options	11,735,042	10,531,938	10,105,546
Options outstanding at end of year, Weighted Average Exercise Price in dollars per share	$ 20.45	$ 21.11	$ 21.27
Options exercisable at end of year, Options	10,103,739	9,414,935	8,533,224
Options exercisable at end of period, Weighted Average Exercise Price in dollars per share	$ 21.32	$ 22.26	$ 23.76
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	3,514,077	746,043	1,721,847
Performance Based Incentive Plan for Senior Management [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based payments award terms of Award	15 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	628,209	385,049	227,049	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	243,160	158,000	227,049
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 14.62	$ 16.63	$ 16.23
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 0.00	$ 0.00	$ 0.00
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 0.00	$ 0.00	$ 0.00
Weighted average per share grant date fair value in dollars per share	$ 15.70	$ 16.39	$ 16.23	$ 0.00