Equity Securities (Tables)

3 Months Ended

Mar. 31, 2022

Investments Debt And Equity Securities [Abstract]

Summary of Investments in Equity Securities, by Classification

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

(in millions)	March 31, 2022		December 31, 2021
Marketable equity securities	$	573	$	657
Non-marketable equity securities		456		441
Equity method investments		65		78
	$	1,094	$	1,176

Summary of Investments in Marketable Equity Securities

Investments in marketable equity securities are summarized as follows:

(in millions)	Cost		Unrealized gains (losses)			Estimated fair value
March 31, 2022
Common stocks	$	399	$	158		$	557
Preferred stocks		17		(1	)		16
	$	416	$	157		$	573
December 31, 2021
Common stocks	$	418		222			640
Preferred stocks		17	$	—		$	17
	$	435	$	222		$	657

Summary of Investments in Non-Marketable Equity Securities

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

(in millions)	Cost			Unrealized gains	Carrying amount
March 31, 2022	$	241	$	215	$	456
December 31, 2021	$	215	$	226	$	441