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Segments (Tables)
9 Months Ended
Sep. 30, 2011
Segment Reporting [Abstract] 
Financial information for each segment [Table Text Block]
The following table summarizes financial information for each segment used by the CODM (in millions):

 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2011
 
2010
 
2011
 
2010
Net revenues:
 
 
 
 
 
 
 
Infrastructure:
 
 
 
 
 
 
 
Routers
$
703.0

 
$
642.6

 
$
2,213.6

 
$
1,872.1

Switches
131.5

 
101.5

 
359.8

 
271.0

Total Infrastructure
834.5

 
744.1

 
2,573.4

 
2,143.1

SLT
271.3

 
268.3

 
754.6

 
760.2

Total net revenues
1,105.8

 
1,012.4

 
3,328.0

 
2,903.3

Segment operating income:
 
 
 
 
 
 
 
Infrastructure
154.6

 
179.9

 
573.8

 
537.6

SLT
66.6

 
64.6

 
135.4

 
152.3

Total segment operating income
221.2

 
244.5

 
709.2

 
689.9

Amortization of purchased intangible assets (1)
(6.7
)
 
(2.4
)
 
(20.2
)
 
(5.0
)
Share-based compensation expense
(60.5
)
 
(44.4
)
 
(169.6
)
 
(129.6
)
Share-based payroll tax expense
(0.2
)
 
(0.5
)
 
(9.2
)
 
(3.8
)
Restructuring
(16.8
)
 
(0.2
)
 
(15.6
)
 
(8.6
)
Acquisition-related and other charges (2)
—

 
(1.5
)
 
(9.3
)
 
(2.1
)
Total operating income
137.0

 
195.5

 
485.3

 
540.8

Other (expense) income, net
(15.9
)
 
0.2

 
(36.1
)
 
5.7

Income before income taxes and noncontrolling interest
$
121.1

 
$
195.7

 
$
449.2

 
$
546.5

________________________________
(1)
Amount includes amortization expense of purchased intangible assets in operating expenses and in cost of revenues.
(2)
Amount includes acquisition-related costs in operating expenses and in cost of revenues.
Net revenues by geographic region [Table Text Block]
The Company attributes revenues to geographic region based on the customer’s ship-to location. The following table shows net revenues by geographic region (in millions):

 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2011
 
2010
 
2011
 
2010
Americas:
 
 
 
 
 
 
 
United States
$
502.3

 
$
481.2

 
$
1,552.3

 
$
1,368.0

Other
54.2

 
51.6

 
164.6

 
147.4

Total Americas
556.5

 
532.8

 
1,716.9

 
1,515.4

Europe, Middle East, and Africa
311.3

 
275.9

 
940.2

 
829.5

Asia Pacific
238.0

 
203.7

 
670.9

 
558.4

Total
$
1,105.8

 
$
1,012.4

 
$
3,328.0

 
$
2,903.3