Employee Benefit Plans, Shares Available For Grant (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	May. 19, 2015
Shares Available For Grant
Options Canceled, Number of Shares	100,000	600,000	1,300,000
Options Expired, Number of Shares	2,700,000	7,200,000	4,100,000
Common Stock for Each Share Subject to RSUs and PSAs	2.1
Restricted Stock Units and Performance Share Awards [Member]
Shares Available For Grant
Fair Market Value on Date of Grant For RSUS And PSAS Issued at Discount, Maximum Percentage	100.00%
Equity Incentive Plan 2006 [Member]
Shares Available For Grant
Beginning Balance, Number of Shares	47,800,000
Awards Granted, Number of Shares	(20,700,000)
Awards Canceled, Number of Shares	7,000,000
Options Canceled, Number of Shares	100,000
Options Expired, Number of Shares	2,700,000
Shares discontinued, Number of Shares	(38,200,000)
Ending Balance, Number of Shares		47,800,000
Equity Incentive Plan 2015 [Member]
Shares Available For Grant
Shares Authorized Under the 2015 Plan, Number of Shares	38,000,000.0			38,000,000
Ending Balance, Number of Shares	36,700,000
Equity Incentive Plan 1996 and 2006 [Member]
Shares Available For Grant
Ending Balance, Number of Shares	0
Maximum Additional Shares Expire Unexercised, Under 1996 and 2000 Plan	29,000,000.0			29,000,000