Goodwill and Purchased Intangible Assets (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 3,928,144,000
Goodwill acquired	59,600,000
Goodwill, end of period	3,987,707,000
Goodwill, Translation and Purchase Accounting Adjustments	0
Goodwill, Impairment Loss	0	0
PSD Segment [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	1,795,600,000
Goodwill acquired	0
Goodwill, end of period	1,795,600,000
SSD Segment [Member]
Goodwill [Roll Forward]
Goodwill, beginning of period	2,132,500,000
Goodwill acquired	59,600,000
Goodwill, end of period	$ 2,192,100,000