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Fair Value (Tables)

12 Months Ended

Dec. 31, 2022

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, 2022 and 2021 (in millions):

		December 31, 2022				Level 1				Level 2				Level 3
Investments in equity securities		$	107			$	107			$	—			$	—
Available-for-sale debt securities			179				—				179				—
Trading securities			5				—				5				—
Total assets		$	291			$	107			$	184			$	—

		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			$	—

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, 2022:
Government		$	107			$	—			$	(11	)		$	96
Corporate			69				—				(9	)			60
Mortgage and asset-backed securities			25				—				(2	)			23
Total available-for-sale debt securities		$	201			$	—			$	(22	)		$	179

						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

Contractual Maturities of Debt Securities

The contractual maturities of debt-based securities held by the Company as of December 31, 2022 and 2021, 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, 2022								December 31, 2021
		Amortized				Estimated				Amortized				Estimated
		Cost				Fair Values				Cost				Fair Values
Within 1 year		$	13			$	13			$	8			$	8
After 1 year and through year 5			74				70				61				61
After 5 years and through year 10			56				48				49				49
After 10 years			58				48				61				60

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,
		2022				2021				2020
Realized gains		$	—			$	1			$	2
Realized losses			(2	)			(1	)			(1	)

Net Gains and Losses Recognized for Investments in Equity Securities

Net gains and losses recognized during the years ended December 31, 2022, 2021 and 2020 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,
		2022				2021				2020
Net (losses) and gains recognized during the year on equity securities		$	(28	)		$	20			$	9
Less: Net (losses) and gains recognized during the year on equity   securities sold during the year			(2	)			13				14
Unrealized (losses) and gains recognized during the year on equity   securities held at the end of year		$	(26	)		$	7			$	(5	)

X

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
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