Investments in Marketable Debt Securities (Tables)

9 Months Ended

Sep. 30, 2014

Investments, Debt and Equity Securities [Abstract]

Marketable Debt Securities

Marketable debt securities at September 30, 2014 and December 31, 2013 consisted of the following:

At September 30, 2014	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. tax-exempt securities	$	359.0	$	1.3	$	.1	$	360.2
U.S. corporate securities		61.1		.3				61.4
U.S. government and agency securities		5.4						5.4
Non-U.S. corporate securities		589.2		4.1				593.3
Non-U.S. government securities		186.0		1.7		.2		187.5
Other debt securities		112.6		.2				112.8
	$	1,313.3	$	7.6	$	.3	$	1,320.6
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:

	September 30, 2014				December 31, 2013
	Less than Twelve Months		Twelve Months or Greater		Less than Twelve Months		Twelve Months or Greater
Fair value	$	163.2	$	26.8	$	388.3	$	28.4
Unrealized losses		.1		.2		.9		.1

Contractual Maturities of Debt Securities

Contractual maturities on marketable debt securities at September 30, 2014 were as follows:

Maturities:	Amortized Cost		Fair Value
Within one year	$	474.2	$	474.8
One to five years		839.0		845.7
More than ten years		.1		.1
	$	1,313.3	$	1,320.6