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Earnings Per Share (Narrative) (Details)		12 Months Ended
Earnings Per Share (Narrative) (Details)	Jan. 29, 2013 shares	Nov. 30, 2017 shares	Nov. 30, 2016 shares	Nov. 30, 2015 shares	Nov. 30, 2013
Debt Instrument [Line Items]
Conversion rate		0.0365297			0.0365297
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		1,600,000	7,300,000	8,000,000
Convertible senior notes due February 1, 2019 at 1.375%
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.375%	1.375%
Convertible Notes Payable [Member] \| Convertible senior notes due February 1, 2019 at 1.375%
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.375%	1.375%
Debt Conversion, Converted Instrument, Shares Issued	36.5297