Stock Benefit Plans And Stock-Based Compensation (Narrative) (Details) (USD $)	12 Months Ended
	Nov. 30, 2011	Nov. 30, 2010	Nov. 30, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares underlying stock options outstanding	15,964,000	22,173,000
Percentage of performance-based restricted stock units not vested	100.00%
Total intrinsic value of stock options exercised	$ 136,800,000	$ 67,300,000	$ 10,500,000
Fair value of stock options vested and expensed	32,200,000	21,500,000	16,200,000
Total tax benefits realized from exercise of stock options and vesting of stock awards	8,600,000	30,600,000	21,600,000
Excess tax benefits from stock-based compensation	41,950,000	21,510,000	17,016,000
Total fair value of shares vested pursuant to stock awards	18,900,000	2,100,000	4,500,000
Stock-based compensation	48,867,000	32,248,000	23,546,000
Deferred tax benefit on stock-based compensation expenses	16,500,000	10,700,000	7,400,000
2008 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant or issuance	6,100,000
Number of shares underlying stock options outstanding	8,900,000
Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant or issuance	300,000
Number of shares underlying stock options outstanding	4,300,000
Number of installments scheduled to vest		2
Number of years scheduled to vest		2
Unrecognized compensation cost related to unvested awards	28,300,000
Weighted-average recognition period (in years) of unvested awards	2.60
Stock-based compensation cost related to stock awards	14,100,000	5,000,000
Percentage of forfeiture upon triggering non-GAAP EPS threshold	20.00%
Fall of non-GAAP EPS in percentage to Trigger forfeiture	10.00%
1996 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares underlying stock options outstanding	10,700,000
Estimated vesting or requisite service period (in years) of the share awards	four
1998 Director Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares underlying stock options outstanding	1,000,000
1998 Plan Prior To December 1, 2005 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term from date of grant (in years)	10
1998 Plan On Or After December 1, 2005 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term from date of grant (in years)	7
2008 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant or issuance	300,000
Shares reserved for future issuance	8,800,000
Description to participate in ESPP	Employees are generally eligible to participate in the 2008 ESPP if they are employed by us for more than 20 hours per week and more than five months in a calendar year and are not (and would not become as a result of being granted an option under the 2008 ESPP) 5% stockholders of the Company.
Minimum rate paid on fair market value of common stock	85.00%
Maximum contribution paid by participants	2,500
Number of shares issued under ESPP	300,000	400,000	500,000
Total value of shares issued under ESPP	3,900,000	3,000,000	2,400,000
2009 Deferred Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant or issuance	985,000
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested awards	19,300,000
Weighted-average recognition period (in years) of unvested awards	2.61
Nonvested Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested awards	48,900,000
Weighted-average recognition period (in years) of unvested awards	2.15
Service-Based Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation cost related to stock awards	23,600,000	17,600,000	12,800,000
Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation cost related to stock awards	9,800,000	8,700,000	9,800,000
Employee Stock Purchase Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation cost related to stock awards	$ 1,400,000	$ 1,000,000	$ 1,000,000
Minimum [Member] | Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated vesting or requisite service period (in years) of the share awards	four
Minimum [Member] | 2008 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Rate of payroll deduction	1.00%
Minimum [Member] | Service-Based Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated vesting or requisite service period (in years) of the share awards	three
Minimum [Member] | Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated vesting or requisite service period (in years) of the share awards	three
Maximum [Member] | Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated vesting or requisite service period (in years) of the share awards	six
Maximum [Member] | 2008 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Rate of payroll deduction	10.00%
Maximum [Member] | Service-Based Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated vesting or requisite service period (in years) of the share awards	four
Maximum [Member] | Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated vesting or requisite service period (in years) of the share awards	four
Condition For Fiscal Year 2012 [Member] | Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-GAAP earnings per share minimum	$ 1.00
Cumulative Non-GAAP earnings per share, minimum	$ 2.40
Condition For Fiscal Year 2013 [Member] | Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-GAAP earnings per share minimum	$ 1.00
Cumulative Non-GAAP earnings per share, minimum	$ 3.00