Employee Benefit Plans (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 49,900,000	$ 65,000,000
Share-Based Compensation Plans
Common Stock, Shares, Issued	510,900,000		508,400,000
Outstanding Stock Options and RSU's from Awards Assumed	6,600,000
Stock Option Activities
Beginning Balance, Number of Shares	34,100,000
Options Granted, Number of Shares	0
Options Canceled, Number of Shares	(400,000)
Options Exercised, Number of Shares	(2,300,000)
Options Expired, Number of Shares	(1,400,000)
Ending Balance, Number of Shares	30,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Beginning Balance, Weighted Average Exercise Price	$ 24.13
Options Granted, Weighted Average Exercise Price	$ 0.00
Options Canceled, Weighted Average Exercise Price	$ 31.35
Options Exercised, Weighted Average Exercise Price	$ 16.17
Options Expired, Weighted Average Exercise Price	$ 27.73
Ending Balance, Weighted Average Exercise Price	$ 24.46
Weighted Average Remaining Contractual Term at Period End	3 years 1 month 6 days
Aggregate Intrinsic Value at Period End	35,800,000
Vested or Expected-to-Vest Options, Number of Shares at Period End	29,200,000
Vested or Expected-to-Vest Options, Weighted Average Exercise Price at Period End	$ 24.50
Vested and Expected-to-Vest Options, Weighted Average Remaining Contractual Term at Period End	3 years
Vested or Expected-to-Vest Options, Aggregate Intrinsic Value at Period End	32,500,000
Exercisable Options, Number of Shares at Period End	24,500,000
Exercisable Options, Weighted Average Exercise Price at Period End	$ 24.33
Exercisable Options, Weighted Average Remaining Contractual Term at Period End	2 years 4 months 24 days
Exercisable Options, Aggregate Intrinsic Value at Period End	18,800,000
Share Price	$ 18.54
Pre-tax intrinsic value of options exercised	11,900,000
Employee Stock Purchase Plan 2008 [Member]
Share-Based Compensation Plans
Number of Shares Available for Future Issuance	7,600,000
Common Stock, Capital Shares Reserved for Future Issuance	19,000,000
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
Share-based Compensation Arrangement by Share-based Payment Award, Offering Period	12 months
Maximum Purchase of Common Stock, Value	25,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	1 year
Common Stock, Shares, Issued	11,400,000
Equity Incentive Plan 2006 [Member]
Share-Based Compensation Plans
Number of Shares in Authorized	149,500,000
Number of Shares Outstanding	52,500,000
Number of Shares Available for Future Issuance	43,800,000
Plan 1996 and 2000 [Member]
Share-Based Compensation Plans
Maximum Additional Shares Expire Unexercised, Under 1996 and 2000 Plan	75,000,000.0
RSUs, RSAs, and PSAs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested and Expected to Vest, Outstanding, Number	24,900,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	3,400,000	5,500,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	9,500,000	17,700,000
RSUs and PSAs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 33,700,000	$ 41,800,000