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Financial Instruments and Fair Value Measurements - (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value Disclosures [Abstract]

Summary of Financial Instruments by Significant Categories and Fair Value Measurement on a Recurring Basis

The following tables summarize our financial instruments by significant categories and fair value measurement on a recurring basis as of March 31, 2022 and December 31, 2021.

(in millions)			Level 1			Level 2			Total
March 31, 2022
Cash equivalents:
Money market mutual funds			$	4		$	—		$	4
U.S. treasuries			—			—			—
Total cash equivalents			4			—			4
Investments:
Asset-backed securities			—			45			45
Corporate bonds			—			137			137
U.S. government agencies and government-sponsored agencies			—			2			2
U.S. treasuries			—			127			127
Other debt securities			—			8			8
Total investments			—			319			319
Restricted cash equivalents:
Money market mutual funds			90			—			90
U.S. treasuries			—			4			4
Total restricted cash equivalents			90			4			94
Restricted investments:
Corporate bonds			—			29			29
U.S. government agencies and government-sponsored agencies			—			13			13
U.S. treasuries			—			175			175
Certificate of deposit			—			11			11
Total restricted investments			—			228			228
Total cash equivalents and investments and restricted cash equivalents and investments			$	94		$	551		$	645

(in millions)			Level 1			Level 2			Total
December 31, 2021
Cash equivalents
Money market mutual funds			$	4		$	—		$	4
U.S. treasuries			—			21			21
Total cash equivalents			4			21			25
Investments
Asset-backed securities			—			49			49
Corporate bonds			—			137			137
U.S. government agencies and government-sponsored agencies			—			2			2
U.S. treasuries			—			106			106
Other debt securities			—			9			9
Total investments			—			303			303
Restricted cash equivalents:
Money market mutual funds			93			—			93
Certificate of deposit			—			1			1
Total restricted cash equivalents			93			1			94
Restricted investments:
Corporate bonds			—			30			30
U.S. government agencies and government-sponsored agencies			—			15			15
U.S. treasuries			—			179			179
Certificate of deposit			—			11			11
Total restricted investments			—			235			235
Total investments and restricted cash equivalents and investments			$	97		$	560		$	657

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- 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 http://asc.fasb.org/extlink&oid=123874694&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 http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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