Quarterly report pursuant to Section 13 or 15(d)

Investments (Tables)

v2.4.0.6
Investments (Tables)
 6 Months Ended
Jun. 30, 2012
Investments [Abstract]  
Schedule of Available-for-sale Securities
The following is a summary of the Company’s available-for-sale securities as of June 30, 2012:
 
(in millions)
Amortized
cost
 
Gross
unrealized
gains
 
Gross
unrealized
losses
 
Fair value
(net carrying amount)
Agency Bonds
$
46.5

 
$
—

 
$
—

 
$
46.5

Corporate Bonds
74.7

 
—

 
(0.1
)
 
74.6

Commercial Paper
21.0

 
—

 
—

 
21.0

U.S. Treasury Bills
0.8

 
—

 
—

 
0.8

Total available-for-sale securities
$
143.0

 
$
—

 
$
(0.1
)
 
$
142.9


The following is a summary of the Company’s available-for-sale securities as of December 31, 2011:
 
(in millions)
Amortized
cost
 
Gross
unrealized
gains
 
Gross
unrealized
losses
 
Fair value
(net carrying amount)
Agency Bonds
$
97.7

 
$
—

 
$
(0.1
)
 
$
97.6

Corporate Bonds
51.7

 
—

 
—

 
51.7

Commercial Paper
19.5

 
—

 
—

 
19.5

U.S. Treasury Bills
0.8

 
—

 
—

 
0.8

Total available-for-sale securities
$
169.7

 
$
—

 
$
(0.1
)
 
$
169.6


The net carrying value and estimated fair value of debt securities at June 30, 2012, by contractual maturity, are shown below:
(in millions)
Amortized
cost
 
Fair value
(net carrying amount)
Available-for-sale debt securities:
 
 
 
Due in one year or less
$
96.5

 
$
96.4

Due after one year through two years
46.5

 
46.5

Total available-for-sale debt securities
$
143.0

 
$
142.9


The net carrying value and estimated fair value of debt securities at December 31, 2011, by contractual maturity, are shown below:
(in millions)
Amortized
cost
 
Fair value
(net carrying amount)
Available-for-sale debt securities:
 
 
 
Due in one year or less
$
76.7

 
$
76.7

Due after one year through two years
93.0

 
92.9

Total available-for-sale debt securities
$
169.7

 
$
169.6