Income Taxes (Narrative) (Details) (USD $)	3 Months Ended								12 Months Ended
	Nov. 30, 2013	Aug. 31, 2013	May 31, 2013	Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2012	Feb. 28, 2012	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2011
Income Taxes [Line Items]
Income tax benefit	$ (15,500,000)	$ (7,900,000)	$ (3,100,000)	$ 100,000	$ (15,300,000)	$ (7,400,000)	$ (7,200,000)	$ (3,300,000)	$ (26,400,000)	$ (33,200,000)	$ (37,300,000)
Undistributed earnings for non-U.S. subsidiaries	331,900,000								331,900,000
Tax benefits from employee stock options plans									14,343,000	24,561,000	8,552,000
Increase in unrecognized tax benefits									34,300,000
Gross unrecognized tax benefits	89,732,000				55,397,000				89,732,000	55,397,000	44,380,000
Amount of unrecognized tax benefits would affect the effective tax rate upon realization	73,500,000								73,500,000
Federal
Income Taxes [Line Items]
Operating loss carryforwards	318,700,000								318,700,000
Net operating losses attributable to stock deductions reduce taxes payable	123,800,000								123,800,000
Tax credit carryforwards	88,300,000								88,300,000
Tax credit carryforwards attributable to stock option benefits	82,400,000								82,400,000
State
Income Taxes [Line Items]
Operating loss carryforwards	152,100,000								152,100,000
Net operating losses attributable to stock deductions reduce taxes payable	109,200,000								109,200,000
Tax credit carryforwards	40,700,000								40,700,000
Tax credit carryforwards attributable to stock option benefits	26,400,000								26,400,000
Additional Paid-In Capital
Income Taxes [Line Items]
Tax benefits from employee stock options plans									14,343,000	24,561,000	8,552,000
Restatement Adjustment | Error Related to Tax Benefit
Income Taxes [Line Items]
Income tax benefit									$ 2,200,000