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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2020

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, 2020 and 2019:

(in millions)			Level 1			Level 2			Total
December 31, 2020
Cash equivalents:
Money market mutual funds			$	2		$	—		$	2
U.S. treasuries			—			11			11
Total cash equivalents			2			11			13
Investments:
Asset-backed securities			—			24			24
Corporate bonds			—			93			93
U.S. government agencies and government-sponsored agencies			—			5			5
U.S. treasuries			—			67			67
Other debt securities			—			6			6
Total investments			—			195			195
Restricted cash equivalents:
Money market mutual funds			99			—			99
Total restricted cash equivalents			99			—			99
Restricted investments:
Corporate bonds			—			35			35
U.S. government agencies and government-sponsored agencies			—			23			23
U.S. treasuries			—			198			198
Total restricted investments			—			256			256
Total investments and restricted cash equivalents and investments			$	101		$	462		$	563

(in millions)			Level 1			Level 2			Total
December 31, 2019
Cash equivalents:
Money market mutual funds			$	89		$	—		$	89
U.S. treasuries			—			3			3
Total cash equivalents			89			3			92
Investments:
Asset-backed securities			—			30			30
Corporate bonds			—			96			96
U.S. government agencies and government-sponsored agencies			—			5			5
U.S. treasuries			—			53			53
Other debt securities			—			10			10
Total investments			—			194			194
Restricted cash equivalents:
Money market mutual funds			42			—			42
U.S. treasuries			—			12			12
Certificate of deposit			—			2			2
Commercial paper			14			—			14
Total restricted cash equivalents			56			14			70
Restricted investments:
Corporate bonds			—			28			28
U.S. government agencies and government-sponsored agencies			—			9			9
U.S. treasuries			—			110			110
Certificate of deposit			—			1			1
Total restricted investments			—			148			148
Total investments and restricted cash equivalents and investments			$	145		$	359		$	504

Schedule of Cash Flow Hedging Instruments

The following table summarizes the fair value of our derivative instrument at December 31, 2020 and 2019:

												Fair Market Value
												December 31, 2020						December 31, 2019
(in millions)			Hedge type			Final settlement date			Notional amount			Other current assets			Accounts payable and other current liabilities			Other current assets			Accounts payable and other current liabilities
Derivatives designated as hedging instruments
Collar - LIBOR			Cash flow			May 2022			$	213		$	—		$	1		$	—		$	—

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 http://asc.fasb.org/extlink&oid=117815213&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=117815213&loc=d3e19207-110258

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- References

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X

- Definition

Tabular disclosure for cash flow hedging instruments of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959

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