Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2021

Investments, Debt and Equity Securities [Abstract]

The following table summarizes, by major security type, our cash, cash equivalents, restricted cash, and marketable securities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy (in millions):


	December 31, 2020		September 30, 2021
	Total Estimated Fair Value		Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Total Estimated Fair Value
Cash	$	10,063	$	10,083	$	—	—		$	10,083
Level 1 securities:
Money market funds	27,430		18,000		—		—		18,000
Equity securities (1)	617								1,633
Level 2 securities:
Foreign government and agency securities	5,131		178		1		—		179
U.S. government and agency securities	7,439		5,385		15		(7)		5,393
Corporate debt securities	29,988		36,775		152		(17)		36,910
Asset-backed securities	3,235		5,936		17		(5)		5,948
Other fixed income securities	710		714		4		(1)		717
Equity securities (1)	40								361
	$	84,653	$	77,071	$	189	$	(30)	$	79,224
Less: Restricted cash, cash equivalents, and marketable securities (2)	(257)								(236)
Total cash, cash equivalents, and marketable securities	$	84,396							$	78,988

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(1)The related unrealized gain (loss) recorded in “Other income (expense), net” was $150 million and $(116) million in Q3 2020 and Q3 2021, and $351 million and $6 million for the nine months ended September 30, 2020 and 2021.

(2)We are required to pledge or otherwise restrict a portion of our cash, cash equivalents, and marketable securities primarily as collateral for real estate, amounts due to third-party sellers in certain jurisdictions, debt, and standby and trade letters of credit. We classify cash, cash equivalents, and marketable securities with use restrictions of less than twelve months as “Accounts receivable, net and other” and of twelve months or longer as non-current “Other assets” on our consolidated balance sheets. See “Note 4 — Commitments and Contingencies.”

Investments Classified by Contractual Maturity Date

The following table summarizes the remaining contractual maturities of our cash equivalents and marketable fixed income securities as of September 30, 2021 (in millions):


	Amortized Cost		Estimated Fair Value
Due within one year	$	38,618	$	38,628
Due after one year through five years	22,603		22,735
Due after five years through ten years	1,809		1,814
Due after ten years	3,958		3,970
Total	$	66,988	$	67,147

Consolidated Statements of Cash Flow Reconciliation - Cash and Cash Equivalents

The following table provides a reconciliation of the amount of cash, cash equivalents, and restricted cash reported within the consolidated balance sheets to the total of the same such amounts shown in the consolidated statements of cash flows (in millions):


	December 31, 2020		September 30, 2021
Cash and cash equivalents	$	42,122	$	29,944
Restricted cash included in accounts receivable, net and other	233		218
Restricted cash included in other assets	22		15
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$	42,377	$	30,177

Consolidated Statements of Cash Flow Reconciliation - Restricted Cash


	December 31, 2020		September 30, 2021
Cash and cash equivalents	$	42,122	$	29,944
Restricted cash included in accounts receivable, net and other	233		218
Restricted cash included in other assets	22		15
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$	42,377	$	30,177