Cash and Cash Equivalents, Investments and Restricted Cash (Tables)

12 Months Ended

Dec. 31, 2022

Cash and Cash Equivalents [Abstract]

Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Market Value of Cash and Cash Equivalents and Available-for-Sale Investments

The following table presents the amortized cost and estimated fair market value of our cash and cash equivalents, investments, and restricted cash as of the dates presented (in millions):


	December 31, 2022				December 31, 2021
	Amortized Cost		Estimated Fair Market Value		Amortized Cost		Estimated Fair Market Value
Cash	$	128	$	128	$	183	$	183
Cash equivalents:
Money market funds	1,338		1,338		2,132		2,132
Short-term investments:
U.S. government treasury securities (1)	1,731		1,716		473		471
Corporate bonds (2)	162		161		33		33
Commercial paper	10		10		10		10
U.S. government agency securities	9		9		—		—
Restricted cash	2		2		1		1
Total	$	3,380	$	3,364	$	2,832	$	2,830

(1) The estimated fair market value includes $15 million and $2 million of gross unrealized losses as of December 31, 2022 and December 31, 2021, respectively.
(2) The estimated fair market value includes $1 million of gross unrealized losses as of December 31, 2022.

Debt Securities, Available-for-Sale

The following table presents available-for-sale investments by contractual maturity date as of December 31, 2022 (in millions):


	Amortized Cost		Estimated Fair Market Value
Due in one year or less	$	1,159	$	1,150
Due after one year	753		746
Total	$	1,912	$	1,896