Investments in Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2022

Marketable securities at June 30, 2022 and December 31, 2021 consisted of the following:

			UNREALIZED		UNREALIZED		FAIR
At June 30, 2022	COST		GAINS		LOSSES		VALUE
Marketable debt securities
U.S. tax-exempt securities	$	469.7	$	.3	$	7.0	$	463.0
U.S. taxable municipal/ provincial bonds		167.0				8.2		158.8
U.S. corporate securities		229.6		.1		9.3		220.4
U.S. government and agency securities		120.4		.2		1.5		119.1
Non-U.S. corporate securities		440.3				14.7		425.6
Non-U.S. government securities		77.3		.1		2.0		75.4
Other debt securities		98.8				4.1		94.7
Marketable equity securities		15.4				13.2		2.2
Total marketable securities	$	1,618.5	$	.7	$	60.0	$	1,559.2

			UNREALIZED		UNREALIZED		FAIR
At December 31, 2021	COST		GAINS		LOSSES		VALUE
Marketable debt securities
U.S. tax-exempt securities	$	431.4	$	1.5	$	.4	$	432.5
U.S. taxable municipal/ provincial bonds		192.2		.6		1.2		191.6
U.S. corporate securities		208.3		.6		1.5		207.4
U.S. government and agency securities		95.9		.6		.1		96.4
Non-U.S. corporate securities		443.9		1.4		2.5		442.8
Non-U.S. government securities		75.2		.1		.3		75.0
Other debt securities		100.4		.3		.7		100.0
Marketable equity securities		15.4		1.3		3.0		13.7
Total marketable securities	$	1,562.7	$	6.4	$	9.7	$	1,559.4

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

Contractual maturities of marketable debt securities at June 30, 2022 were as follows: