Employee Benefit Plans (Details) (USD $)	3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2011 Year month investments	Sep. 30, 2011 Year issuers day month investments	Sep. 30, 2011 Employee Stock Purchase Plan 2008 [Member]	Sep. 30, 2011 Stock Options [Member] Year	Sep. 30, 2011 Employee Stock Purchase Plan [Member] Year	Sep. 30, 2011 Employee Stock Purchase Plan [Member] Year month	Jun. 30, 2011 Equity Incentive Plan 2006 [Member]	Jun. 30, 2010 Equity Incentive Plan 2006 [Member]	Sep. 30, 2011 Equity Incentive Plan 2006 [Member]		Dec. 31, 2010 Equity Incentive Plan 2006 [Member]
Share-Based Compensation Plans
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price			15.00%
Periodic Payroll Deduction - Percentage of Base Salary			10.00%
Maximum Purchase of Common Stock, Shares			6,000
ESPP purchase period, share limitation (in months)						12
Maximum Purchase of Common Stock, Value			$ 25,000
ESPP purchase period, value limitation (in calendar years)						1
Number of Shares in Authorized									64,500,000
Maximum Additional Shares Expire Unexercised, Under 1996 and 2000 Plan	75,000,000	75,000,000
Additional Authorized Share Reserve Approved By Shareholders							30,000,000	30,000,000	30,000,000
Number of Shares Outstanding									57,700,000
Number of Shares Available for Future Issuance									43,300,000		30,700,000
Outstanding Stock Options and RSU's Covering Shares of Common Stock	1,500,000	1,500,000
Stock Option Activities
Share-based compensation stock option contractual life from grant date since 2006, in years				7
Share-based compensation stock option contractual life from grant date, prior to 2006, in years					10
Beginning Balance, Number of Shares		49,400,000
Beginning Balance, Weighted Average Exercise Price		$ 21.90
Options Granted, Number of Shares		4,800,000							4,800,000
Options Granted, Weighted Average Exercise Price	$ 40.16	$ 40.16
Options Canceled, Number of Shares		(1,700,000)							(1,700,000)	[1]
Options Canceled, Weighted Average Exercise Price	$ 26.31	$ 26.31
Options Exercised, Number of Shares		(13,500,000)
Options Exercised, Weighted Average Exercise Price	$ 21.37	$ 21.37
Options Expired, Number of Shares		(200,000)							(200,000)	[1]
Options Expired, Weighted Average Exercise Price	$ 46.12	$ 46.12
Ending Balance, Number of Shares	38,800,000	38,800,000
Ending Balance, Weighted Average Exercise Price	$ 23.99	$ 23.99
Weighted Average Remaining Contractual Term at Period End	3.9	3.9
Aggregate Intrinsic Value at Period End	39,200,000	39,200,000
Vested or Expected-to-Vest Options, Number of Shares at Period End	36,900,000	36,900,000
Vested or Expected-to-Vest Options, Weighted Average Exercise Price at Period End	$ 23.60	$ 23.60
Vested and Expected-to-Vest Options, Weighted Average Remaining Contractual Term at Period End		3.8
Vested or Expected-to-Vest Options, Aggregate Intrinsic Value at Period End	38,500,000	38,500,000
Exercisable Options, Number of Shares at Period End	25,200,000	25,200,000
Exercisable Options, Weighted Average Exercise Price at Period End	$ 21.28	$ 21.28
Exercisable Options, Weighted Average Remaining Contractual Term at Period End		3.1
Exercisable Options, Aggregate Intrinsic Value at Period End	32,100,000	32,100,000
Closing Stock Price At Plan Period End	$ 17.26	$ 17.26
Intrinsic Value of Options Exercise, Pre-Tax	5,200,000	246,100,000
Total Fair Value of Options Vested	$ 17,200,000	$ 63,400,000

[1] Includes canceled or expired options under the 1996 Plan and the 2000 Plan that expired unexercised after May 18, 2006, which become available for grant under the 2006 Plan according to its terms.