Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2010
Income Taxes [Line Items]
Undistributed earnings for non-U.S. subsidiaries	$ 256,400,000
Decrease in valuation allowance	5,600,000
Tax benefits from employee stock options plans	24,561,000	8,552,000	30,626,000
Increase in unrecognized tax benefits	10,900,000
Gross unrecognized tax benefits	55,397,000	44,380,000
Amount of unrecognized tax benefits would affect the effective tax rate upon realization	37,900,000
Federal
Income Taxes [Line Items]
Operating loss carryforwards	332,000,000
Net operating losses attributable to stock deductions reduce taxes payable	152,500,000
Tax credit carryforwards	82,400,000
Tax credit carryforwards attributable to stock option benefits	77,300,000
State
Income Taxes [Line Items]
Operating loss carryforwards	168,000,000
Net operating losses attributable to stock deductions reduce taxes payable	124,700,000
Tax credit carryforwards	38,700,000
Tax credit carryforwards attributable to stock option benefits	25,100,000
Additional Paid-In Capital
Income Taxes [Line Items]
Tax benefits from employee stock options plans	$ 24,561,000	$ 8,552,000	$ 30,626,000