Employee Benefit Plans, Share Based Compensation by Cost and Expense Categories (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-Based Compensation Expense	$ 61.5	$ 61.8	$ 111.4	$ 126.8
Stock Options [Member]
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-Based Compensation Expense	7.7	15.1	17.2	32.8
RSUs, RSAs, and PSAs [Member]
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-Based Compensation Expense	49.3	41.3	86.3	83.1
Employee Stock Purchase Plan [Member]
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-Based Compensation Expense	4.5	5.4	7.9	10.9
Cost of Revenues, Product [Member]
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-Based Compensation Expense	1.2	1.1	2.1	2.1
Cost of Revenues, Service [Member]
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-Based Compensation Expense	3.5	4.2	8.1	9.5
Research and Development Expense [Member]
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-Based Compensation Expense	33.0	28.5	56.6	54.3
Selling and Marketing Expense [Member]
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-Based Compensation Expense	18.1	21.0	32.6	42.9
General and Administrative Expense [Member]
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-Based Compensation Expense	$ 5.7	$ 7.0	$ 12.0	$ 18.0