Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Net Revenues [Abstract]
Total net revenues	$ 1,059.2		$ 1,032.5
Segment Operating Income [Abstract]
Total segment contribution margin	432.1		386.6
Corporate Unallocated Expenses	(266.1)	[1]	(263.1)	[1]
Amortization of purchased intangible assets	(7.5)	[2]	(7.3)	[2]
Share-based Compensation Expense	(49.9)		(65.0)
Share-based payroll tax expense	(3.5)		(0.3)
Restructuring charges	(7.7)	[3]	(2.0)	[3]
Acquisition and litigation charges	(10.4)		(1.2)
Operating income	87.0		47.7
Other expense, net	(10.1)		(24.4)
Income before income taxes	76.9		23.3
PSD Segment [Member]
Net Revenues [Abstract]
Total net revenues	809.2		765.7
Segment Operating Income [Abstract]
Total segment contribution margin	330.1		276.3
Depreciation by Segment [Abstract]
Depreciation expense	34.4		26.9
SSD Segment [Member]
Net Revenues [Abstract]
Total net revenues	250.0		266.8
Segment Operating Income [Abstract]
Total segment contribution margin	102.0		110.3
Depreciation by Segment [Abstract]
Depreciation expense	$ 9.7		$ 9.2

[1] Amount includes unallocated costs for global functions such as sales, marketing, and general and administrative.

[2] Amount includes amortization expense of purchased intangible assets reported in operating expenses and in cost of revenues.

[3] Amount includes restructuring charges reported in operating expenses and in cost of revenues.