Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2012

Fair Value Measurements

Schedule of assets and liabilities measured on a recurring basis, at fair value

	March 31, 2012
	Level 1		Level 2		Level 3		Total
Treasury bills	$	86.6	$	51.0	$	—	$	137.6
FDIC insured corporate bonds	106.4		—		—		106.4
Government Agency Securities	54.8		68.0		—		122.8
Derivative instrument	—		0.1		—		0.1
Total	$	247.8	$	119.1	$	—	$	366.9

	December 31, 2011
	Level 1		Level 2		Level 3		Total
Treasury bills	$	70.2	$	20.0	$	—	$	90.2
FDIC insured corporate bonds	114.8		—		—		114.8
Government Agency Securities	88.6		81.2		—		169.8
Money market instruments	—		0.2		—		0.2
Total	$	273.6	$	101.4	$	—	$	375.0

Schedule of assets and liabilities measured on a nonrecurring basis, at fair value

	March 31, 2012
	Level 1		Level 2		Level 3		Total
Property,plant and equipment, net	$	—	$	—	$	92.0	$	92.0
Goodwill	—		—		55.8		55.8
Intangible assets, net	—		—		24.7		24.7
Total	$	—	$	—	$	172.5	$	172.5

	December 31, 2011
	Level 1		Level 2		Level 3		Total
Property,plant and equipment, net	$	—	$	—	$	86.1	$	86.1
Goodwill	—		—		55.8		55.8
Intangible assets, net	—		—		25.9		25.9
Total	$	—	$	—	$	167.8	$	167.8