Financial Instruments (Tables)

6 Months Ended

Jun. 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		June 30, 2021
	Total Estimated Fair Value		Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Total Estimated Fair Value
Cash	$	10,063	$	10,266	$	—	—		$	10,266
Level 1 securities:
Money market funds	27,430		24,587		—		—		24,587
Equity securities (1)	617								772
Level 2 securities:
Foreign government and agency securities	5,131		1,423		1		—		1,424
U.S. government and agency securities	7,439		6,987		18		(9)		6,996
Corporate debt securities	29,988		39,049		189		(14)		39,224
Asset-backed securities	3,235		4,976		20		(4)		4,992
Other fixed income securities	710		785		6		(1)		790
Equity securities (1)	40								1,133
	$	84,653	$	88,073	$	234	$	(28)	$	90,184
Less: Restricted cash, cash equivalents, and marketable securities (2)	(257)								(290)
Total cash, cash equivalents, and marketable securities	$	84,396							$	89,894

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(1)The related unrealized gain (loss) recorded in “Other income (expense), net” was $235 million and $119 million in Q2 2020 and Q2 2021, and $204 million and $122 million for the six months ended June 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 June 30, 2021 (in millions):


	Amortized Cost		Estimated Fair Value
Due within one year	$	50,515	$	50,530
Due after one year through five years	22,210		22,382
Due after five years through ten years	1,445		1,450
Due after ten years	3,637		3,651
Total	$	77,807	$	78,013

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		June 30, 2021
Cash and cash equivalents	$	42,122	$	40,380
Restricted cash included in accounts receivable, net and other	233		265
Restricted cash included in other assets	22		22
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$	42,377	$	40,667

Consolidated Statements of Cash Flow Reconciliation - Restricted Cash


	December 31, 2020		June 30, 2021
Cash and cash equivalents	$	42,122	$	40,380
Restricted cash included in accounts receivable, net and other	233		265
Restricted cash included in other assets	22		22
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$	42,377	$	40,667