Financial Instruments (Tables)

3 Months Ended

Mar. 31, 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		March 31, 2021
	Total Estimated Fair Value		Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Total Estimated Fair Value
Cash	$	10,063	$	10,070	$	—	—		$	10,070
Level 1 securities:
Money market funds	27,430		22,902		—		—		22,902
Equity securities (1)	617								683
Level 2 securities:
Foreign government and agency securities	5,131		2,355		1		(1)		2,355
U.S. government and agency securities	7,439		5,712		25		(10)		5,727
Corporate debt securities	29,988		27,243		206		(19)		27,430
Asset-backed securities	3,235		3,456		22		(4)		3,474
Other fixed income securities	710		946		7		(1)		952
Equity securities (1)	40								—
	$	84,653	$	72,684	$	261	$	(35)	$	73,593
Less: Restricted cash, cash equivalents, and marketable securities (2)	(257)								(323)
Total cash, cash equivalents, and marketable securities	$	84,396							$	73,270

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(1)The related unrealized gain (loss) recorded in “Other income (expense), net” was $(31) million and $3 million in Q1 2020 and Q1 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 March 31, 2021 (in millions):


	Amortized Cost		Estimated Fair Value
Due within one year	$	41,195	$	41,210
Due after one year through five years	17,607		17,791
Due after five years through ten years	1,068		1,074
Due after ten years	2,744		2,765
Total	$	62,614	$	62,840

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		March 31, 2021
Cash and cash equivalents	$	42,122	$	33,834
Restricted cash included in accounts receivable, net and other	233		299
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	$	34,155

Consolidated Statements of Cash Flow Reconciliation - Restricted Cash


	December 31, 2020		March 31, 2021
Cash and cash equivalents	$	42,122	$	33,834
Restricted cash included in accounts receivable, net and other	233		299
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	$	34,155