Employee Benefit Plans (Details) - USD ($)				12 Months Ended
	Dec. 06, 2016	Aug. 09, 2016	Apr. 01, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 30, 2016	May 31, 2015	May 19, 2015
Share-Based Compensation Plans
Common stock - shares issued				381,100,000	384,000,000
Common shares outstanding from equtiy awards through acquisition				4,100,000
Share Price (in USD per share)								$ 28.26
Intrinsic value of options exercised in period				$ 7,100,000	$ 27,500,000	$ 33,400,000
Total Fair Value of Options Vested				$ 3,900,000	$ 7,000,000	$ 20,800,000
Stock Option Activities
Beginning Balance, Number of Shares				3,600,000	9,900,000	23,100,000
Options Assumed, Number of Shares				100,000
Options Canceled, Number of Shares				(300,000)	(100,000)	(600,000)
Options Exercised, Number of Shares				(700,000)	(3,500,000)	(5,400,000)
Options Expired, Number of Shares				(300,000)	(2,700,000)	(7,200,000)
Ending Balance, Number of Shares				2,400,000	3,600,000	9,900,000	23,100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Beginning Balance, Weighted Average Exercise Price (in USD per share)				$ 27.52	$ 24.87	$ 25.15
Options Assumed, Weighted Average Exercise Price (in USD per share)				7.01
Options Canceled, Weighted Average Exercise Price (in USD per share)				36.57	23.65	30.15
Options Exercised, Weighted Average Exercise Price (in USD per share)				14.47	19.78	19.76
Options Expired, Weighted Average Exercise Price (in USD per share)				24.84	27.99	29.11
Ending Balance, Weighted Average Exercise Price (in USD per share)				$ 29.20	$ 27.52	$ 24.87	$ 25.15
Weighted Average Remaining Contractual Term at Period End				1 year 6 months 20 days	2 years 1 month 16 days	2 years	2 years 4 months 26 days
Aggregate Intrinsic Value at Period End				$ 9,900,000	$ 16,600,000	$ 24,700,000	$ 44,600,000
Vested or Expected-to-Vest Options, Number of Shares at Period End				2,400,000
Vested or Expected-to-Vest Options, Weighted Average Exercise Price at Period End (in USD per share)				$ 29.20
Vested and Expected-to-Vest Options, Weighted Average Remaining Contractual Term at Period End				1 year 6 months 20 days
Vested or Expected-to-Vest Options, Aggregate Intrinsic Value at Period End				$ 9,900,000
Exercisable Options, Number of Shares at Period End				2,300,000
Exercisable Options, Weighted Average Exercise Price at Period End (in USD per share)				$ 29.95
Exercisable Options, Weighted Average Remaining Contractual Term at Period End				1 year 3 months 28 days
Exercisable Options, Aggregate Intrinsic Value at Period End				$ 8,200,000
Stock Compensation Plan [Member]
Share-Based Compensation Plans
Number of shares of common stock reserved for future issuance for equity incentive plans				40,700,000
Stock Options [Member] | Prior to 2006 [Member]
Share-Based Compensation Plans
Maximum Term for Options				10 years
Employee Stock Options, Restricted Stock Units (RSUs), Restricted Stock Awards and Performance Shares [Member] | AppFormix [Member]
Share-Based Compensation Plans
Shares assumed in business acquisition	900,000
Employee Stock Options, Restricted Stock Units (RSUs), Restricted Stock Awards and Performance Shares [Member] | Aurrion, Inc [Member]
Share-Based Compensation Plans
Shares assumed in business acquisition		2,500,000
Restricted Stock Units (RSUs) and Performance Shares [Member] | BTI Systems, Inc [Member]
Share-Based Compensation Plans
Shares assumed in business acquisition			400,000
RSUs, RSAs, and PSAs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Vested and Expected-to-Vest Options, Weighted Average Remaining Contractual Term at Period End				1 year 14 days
RSUs, RSAs, and PSAs [Member] | WANDL, Inc, [Member]
Share-Based Compensation Plans
Options Assumed, Number of Shares						1,500,000
Equity Incentive Plan 2015 [Member]
Share-Based Compensation Plans
Number of shares authorized (in shares)										38,000,000
Number of shares available for future issuance (in shares)				22,500,000.0	36,700,000.0
Equity Incentive Plan 2015 and 2006 [Member]
Share-Based Compensation Plans
Shares outstanding under the 2015 and 2006 plans (in shares)				19,300,000
Equity Incentive Plan 1996 and 2006 [Member]
Share-Based Compensation Plans
Maximum Additional Shares Expire Unexercised, Under 1996 and 2000 Plan										29,000,000
Number of shares available for future issuance (in shares)				0
Equity Incentive Plan 2006 [Member]
Stock Option Activities
Options Canceled, Number of Shares				(300,000.0)
Options Expired, Number of Shares				(300,000.0)
Equity Incentive Plan 2006 [Member] | Stock Options [Member] | From 2006 [Member]
Share-Based Compensation Plans
Maximum Term for Options				7 years
Employee Stock Purchase Plan 2008 [Member]
Share-Based Compensation Plans
Number of shares authorized (in shares)				26,000,000
Number of shares available for future issuance (in shares)				4,900,000
Discount on share purchase price for purchases made under ESPP				15.00%
Periodic Payroll Deduction - Percentage of Base Salary				10.00%
ESPP individual purchase limits (in shares)				6,000
Period for share purchases under ESPP				12 months
ESPP individual purchase limits				$ 25,000
Period for ESPP purchases				1 year
Common stock - shares issued				21,100,000
Employee Stock Purchase Plan 2008 Additional Authorization [Member]
Share-Based Compensation Plans
Number of shares authorized (in shares)									7,000,000