XML 41 R31.htm IDEA: XBRL DOCUMENT

Equity Securities (Tables)

9 Months Ended

Sep. 30, 2023

Investments, Debt and Equity Securities [Abstract]

Summary of Investments in Equity Securities, by Accounting Classification

Investments in equity securities, by classification, are summarized as follows:


(in millions)		September 30, 2023				December 31, 2022
Marketable equity securities		$	407.3			$	279.5
Non-marketable equity securities			226.7				395.8
Equity method investments			74.7				78.9
		$	708.7			$	754.2

Summary of Investments in Marketable Equity Securities

Investments in marketable equity securities are summarized as follows:


(in millions)		Cost				Unrealized losses				Estimated fair value
September 30, 2023
Common stocks		$	432.0			$	(36.0	)		$	396.0
Preferred stocks			15.3				(4.0	)			11.3
		$	447.3			$	(40.0	)		$	407.3
December 31, 2022
Common stocks		$	323.7			$	(55.6	)		$	268.1
Preferred stocks			15.3				(3.9	)			11.4
		$	339.0			$	(59.5	)		$	279.5

Summary of Investments in Non-Marketable Equity Securities

Investments in non-marketable equity securities are summarized as follows:


(in millions)		Cost				Unrealized (losses) gains				Carrying amount
September 30, 2023		$	300.1			$	(73.4	)		$	226.7
December 31, 2022		$	307.2			$	88.6			$	395.8