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Financial Instruments And Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Investments, Debt and Equity Securities [Abstract]

Fair Value Measurements on a Recurring Basis

The following tables summarize our financial instruments by significant categories and fair value measurement on a recurring basis as of December 31, 2018 and 2017:

(in millions)	Level 1			Level 2			Total
December 31, 2018
Cash equivalents:
Money market mutual funds	$	4		$	—		$	4
U.S. treasuries	—			1			1
Total cash equivalents	4			1			5
Investments:
Asset-backed securities	—			33			33
Corporate bonds	—			99			99
U.S. government agencies and government-sponsored agencies	—			7			7
U.S. treasuries	—			41			41
Other debt securities	—			9			9
Total investments	—			189			189
Restricted cash equivalents:
Money market mutual funds	48			—			48
Commercial paper	20			—			20
Total restricted cash equivalents	68			—			68
Restricted investments:
U.S. treasuries	—			5			5
Exchange traded fund	1			—			1
Certificate of deposit	—			2			2
Total restricted investments	1			7			8
Total investments and restricted cash equivalents and investments	$	73		$	197		$	270

(in millions)	Level 1			Level 2			Total
December 31, 2017
Restricted cash equivalents:
Money market mutual funds	$	199		$	—		$	199
Commercial paper	21			—			21
Total restricted cash equivalents	220			—			220
Restricted investments:
U.S. treasuries	37			—			37
Exchange traded fund	1			—			1
Certificate of deposit	—			2			2
Total restricted investments	38			2			40
Total restricted cash equivalents and investments	$	258		$	2		$	260

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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=99377789&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 1
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258

Reference 3: 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=99377789&loc=d3e19207-110258

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X

- References

No definition available.

+ Details

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