Employee Benefit and Stock Plans (Details 1)	12 Months Ended
	Nov. 30, 2017 $ / shares shares
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	$ 6.32
Range of Exercise Price in dollars per share, Maximum	$ 45.68
Options Outstanding, Options | shares	9,265,240.00
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 17.64
Options Outstanding, Weighted Average Remaining Contractual Life	4 years 3 months 1 day
Options Exercisable, Options | shares	8,307,632.000
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 17.86
Options Exercisable, Weighted Average Remaining Contractual Life	3 years 9 months 1 day
$ 6.32 to $11.05
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	$ 6.32
Range of Exercise Price in dollars per share, Maximum	$ 11.05
Options Outstanding, Options | shares	1,361,500
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 6.36
Options Outstanding, Weighted Average Remaining Contractual Life	3 years 10 months 30 days
Options Exercisable, Options | shares	1,361,500
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 6.36
$11.06 to $14.62
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	11.06
Range of Exercise Price in dollars per share, Maximum	$ 14.62
Options Outstanding, Options | shares	2,165,435
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 12.96
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 1 day
Options Exercisable, Options | shares	2,165,435
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 12.96
$14.63 to $16.20
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	14.63
Range of Exercise Price in dollars per share, Maximum	$ 16.20
Options Outstanding, Options | shares	2,064,255
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 15.15
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 1 day
Options Exercisable, Options | shares	1,709,586
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 15.19
$16.21 to $28.10
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	16.21
Range of Exercise Price in dollars per share, Maximum	$ 28.10
Options Outstanding, Options | shares	2,106,093
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 17.62
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 3 months 1 day
Options Exercisable, Options | shares	1,503,154
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 18.18
$28.11 to $45.68
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	28.11
Range of Exercise Price in dollars per share, Maximum	$ 45.68
Options Outstanding, Options | shares	1,567,957
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 37.23
Options Outstanding, Weighted Average Remaining Contractual Life	1 year 5 months 1 day
Options Exercisable, Options | shares	1,567,957
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 37.23