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Investments (Tables)

3 Months Ended

Mar. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments

The following tables summarize our current investments as of the dates indicated:

			March 31, 2022
			Amortized Cost						Gross Unrealized												Estimated Fair Value
									Gains						Losses
			(In millions)
Corporate debt securities			$	1,874					$	1					$	67					$	1,808
Mortgage-backed securities			622						—						24						598
Asset-backed securities			261						—						9						252
U.S. Treasury notes			174						—						—						174
Municipal securities			123						—						6						117
Other			40						—						1						39
Total			$	3,094					$	1					$	107					$	2,988

			December 31, 2021
			Amortized Cost						Gross Unrealized												Estimated Fair Value
									Gains						Losses
			(In millions)
Corporate debt securities			$	1,836					$	9					$	12					$	1,833
Mortgage-backed securities			616						2						4						614
Asset-backed securities			248						—						1						247
U.S. Treasury notes			353						—						—						353
Municipal securities			123						1						1						123
Other			32						—						—						32
Total			$	3,208					$	12					$	18					$	3,202

Schedule of Contractual Maturities of Investments

The contractual maturities of our current investments as of March 31, 2022 are summarized below:

			Amortized Cost						Estimated Fair Value
			(In millions)
Due in one year or less			$	466					$	466
Due after one year through five years			1,733						1,668
Due after five years through ten years			318						306
Due after ten years			577						548
Total			$	3,094					$	2,988

Schedule of Available-for-Sale Investments

The following table summarizes those available-for-sale investments that have been in a continuous loss position for less than 12 months. No investments have been in a continuous loss position for 12 months or more as of March 31, 2022, and December 31, 2021.

			March 31, 2022																		December 31, 2021
			Estimated Fair Value						Unrealized Losses						Total Number of Positions						Estimated Fair Value						Unrealized Losses						Total Number of Positions
			(Dollars in millions)
Corporate debt securities			$	1,516					$	67					624						$	1,063					$	12					395
Mortgage-backed securities			582						24						238						408						4						146
Asset-backed securities			208						9						99						166						1						75
Municipal securities			97						6						120						69						1						61
Other			25						1						10						—						—						—
Total			$	2,428					$	107					1,091						$	1,706					$	18					677

X

- Definition

Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27290-111563

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455

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