Fair Value Measurements (Tables)

6 Months Ended

12 Months Ended

Dec. 31, 2011

Jun. 30, 2011

Schedule Of Assets Measured At Fair Value On A Recurring Basis


	Level 1		Level 2		Level 3		Total

U.S Treasury and direct obligations of U.S. government agencies	$	-	$	6,810.6	$	-	$	6,810.6
Corporate bonds		-		6,483.9		-		6,483.9
Asset-backed securities		-		376.7		-		376.7
Commercial mortgage-backed securities		-		388.0		-		388.0
Municipal bonds		-		528.1		-		528.1
Canadian government obligations and Canadian government agency obligations		-		1,027.5		-		1,027.5
Other securities		18.8		1,515.8		-		1,534.6
Total available-for-sale securities	$	18.8	$	17,130.6	$	-	$	17,149.4


	Level 1		Level 2		Level 3		Total

U.S Treasury and direct obligations of U.S. government agencies	$	-	$	6,759.1	$	-	$	6,759.1
Corporate bonds		-		6,126.6		-		6,126.6
Asset-backed securities		-		447.8		-		447.8
Commercial mortgage-backed securities		-		492.5		-		492.5
Municipal bonds		-		516.2		-		516.2
Canadian government obligations and Canadian government agency obligations		-		1,101.5		-		1,101.5
Other securities		20.1		1,463.7		-		1,483.8
Total available-for-sale securities	$	20.1	$	16,907.4	$	-	$	16,927.5

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

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