Investments in Marketable Debt Securities (Tables)

3 Months Ended

Mar. 31, 2014

Marketable Debt Securities

Marketable debt securities at March 31, 2014 and December 31, 2013 consisted of the following:

At March 31, 2014	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. tax-exempt securities	$	218.0	$	1.2	$	.1	$	219.1
U.S. corporate securities		56.5		.1				56.6
U.S. government and agency securities		5.5						5.5
Non-U.S. corporate securities		683.5		2.0		.1		685.4
Non-U.S. government securities		183.5		.9		.3		184.1
Other debt securities		99.6		.1				99.7
	$	1,246.6	$	4.3	$	.5	$	1,250.4
At December 31, 2013	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. tax-exempt securities	$	214.9	$	1.2			$	216.1
U.S. corporate securities		78.2		.1	$	.1		78.2
U.S. government and agency securities		5.5						5.5
Non-U.S. corporate securities		608.5		1.2		.4		609.3
Non-U.S. government securities		217.3		.7		.5		217.5
Other debt securities		140.5		.4				140.9
	$	1,264.9	$	3.6	$	1.0	$	1,267.5

Marketable Debt Securities Continuous Unrealized Losses

Marketable debt securities with continuous unrealized losses and their related fair values were as follows:

	March 31, 2014			December 31, 2013
		Less than Twelve Months	Twelve Months or Greater		Less than Twelve Months		Twelve Months or Greater
Fair value	$	247.9		$	388.3	$	28.4
Unrealized losses		.5			.9		.1

Contractual Maturities of Debt Securities

Contractual maturities on marketable debt securities at March 31, 2014 were as follows:

Maturities:	Amortized Cost		Fair Value
Within one year	$	486.8	$	487.3
One to five years		759.5		762.8
Six to ten years		.3		.3
	$	1,246.6	$	1,250.4