Fair Value (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets Measured on Recurring Basis

The following table sets forth, by level within the fair value hierarchy, the financial assets recorded at fair value on a recurring basis as of December 31, 2021 and 2020 (in millions):

	December 31, 2021		Level 1		Level 2		Level 3
Investments in equity securities	$	144	$	144	$	—	$	—
Available-for-sale debt securities		178		—		178		—
Trading securities		13		—		13		—
Total assets	$	335	$	144	$	191	$	—

	December 31, 2020		Level 1		Level 2		Level 3
Investments in equity securities	$	129	$	129	$	—	$	—
Available-for-sale debt securities		110		—		110		—
Trading securities		12		—		12		—
Total assets	$	251	$	129	$	122	$	—

Supplemental Information Regarding Available-for-Sale Debt Securities

Supplemental information regarding the Company’s available-for-sale debt securities (all of which had no withdrawal restrictions) is set forth in the table below (in millions):

			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Values
As of December 31, 2021:
Government	$	83	$	1	$	(1	)	$	83
Corporate		62		—		(1	)		61
Mortgage and asset-backed securities		34		—		—			34
Total available-for-sale debt securities	$	179	$	1	$	(2	)	$	178

			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Values
As of December 31, 2020:
Government	$	48	$	2	$	—	$	50
Corporate		38		2		—		40
Mortgage and asset-backed securities		19		1		—		20
Total available-for-sale debt securities	$	105	$	5	$	—	$	110

Contractual Maturities of Debt Securities

The contractual maturities of debt-based securities held by the Company as of December 31, 2021 and 2020, excluding mutual fund holdings, are set forth in the table below (in millions). Expected maturities will differ from contractual maturities because the issuers of the debt securities may have the right to prepay their obligations without prepayment penalties.

	December 31, 2021				December 31, 2020
	Amortized		Estimated		Amortized		Estimated
	Cost		Fair Values		Cost		Fair Values
Within 1 year	$	8	$	8	$	3	$	3
After 1 year and through year 5		61		61		26		27
After 5 years and through year 10		49		49		30		32
After 10 years		61		60		46		48

Gross Realized Gains and Losses and Investment Income on Available-for-Sale Debt Securities

Gross realized gains and losses on sales of available-for-sale debt securities are summarized in the table below (in millions):

	Year Ended December 31,
	2021			2020			2019
Realized gains	$	1		$	2		$	—
Realized losses		(1	)		(1	)		—

Net Gains and Losses Recognized for Investments in Equity Securities

Net gains and losses recognized during the years ended December 31, 2021, 2020 and 2019 for investments in equity securities, which are broken out between investments sold during the year and investments held at the end of the year, are summarized in the table below (in millions):

	Year Ended December 31,
	2021		2020			2019
Net gains and (losses), beginning of year	$	20	$	9		$	15
Less: Net gains and (losses) recognized during the year on equity securities sold during the year		13		14			2
Unrealized gains and (losses) recognized during the year on equity securities held, end of year	$	7	$	(5	)	$	13