Goodwill and Purchased Intangible Assets, Goodwill (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Goodwill [Roll Forward]
Balance as of December 31, 2012	$ 4,057.8
Reclassifications	0
Foreign currency translation adjustment	(0.1)
Balance as of September 30, 2013	4,057.7
PSD segment
Goodwill [Roll Forward]
Balance as of December 31, 2012	1,866.3
Reclassifications	(249.6)
Foreign currency translation adjustment	(0.1)
Balance as of September 30, 2013	1,616.6
SSD segment
Goodwill [Roll Forward]
Balance as of December 31, 2012	2,191.5
Reclassifications	249.6
Foreign currency translation adjustment	0
Balance as of September 30, 2013	$ 2,441.1