Employee Benefit and Stock Plans (Details) - $ / shares	12 Months Ended
	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012
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	11,735,042	10,531,938	10,105,546
Options outstanding at beginning of year, Weighted Average Exercise Price in dollars per share	$ 20.45	$ 21.11	$ 21.27
Granted, Options	1,262,000	1,273,647	550,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price in dollars per share	$ 14.92	$ 14.62	$ 16.63
Employee stock options/other, Shares	(76,164)	(36,665)	(118,208)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price in dollars per share	$ 9.69	$ 7.92	$ 13.46
Cancelled, Options	(285,234)	(33,878)	(5,400)
Cancelled, Weighted Average Exercise Price in dollars per share	$ 45.80	$ 20.25	$ 24.24
Options outstanding at end of year, Options	12,635,644	11,735,042	10,531,938
Options outstanding at end of year, Weighted Average Exercise Price in dollars per share	$ 19.39	$ 20.45	$ 21.11
Options exercisable at end of year, Options	10,389,722	10,103,739	9,414,935
Options exercisable at end of period, Weighted Average Exercise Price in dollars per share	$ 20.35	$ 21.32	$ 22.26
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	1,544,195	3,514,077	746,043
Equity Incentive Two Thousand Fourteen Plan [Member] [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based payments award terms of Award	10 years
Director Plan SARs [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based payments award terms of Award	15 years
Performance Based Incentive Plan for Senior Management [Member]
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	820,209	628,209	385,049	227,049
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	192,000	243,160	158,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 14.92	$ 14.62	$ 16.63
Weighted average per share grant date fair value in dollars per share	$ 15.52	$ 15.70	$ 16.39	$ 16.23