Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2020

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, 2019		June 30, 2020
	Total Estimated Fair Value		Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Total Estimated Fair Value
Cash	$	9,776	$	9,277	$	—	$	—	$	9,277
Level 1 securities:
Money market funds	18,850		21,818		—		—		21,818
Equity securities (1)	202								407
Level 2 securities:
Foreign government and agency securities	4,794		6,324		1		—		6,325
U.S. government and agency securities	7,080		8,087		37		(1)		8,123
Corporate debt securities	11,881		21,785		271		(11)		22,045
Asset-backed securities	2,360		3,277		23		(13)		3,287
Other fixed income securities	394		477		6		—		483
Equity securities (1)	5								4
	$	55,342	$	71,045	$	338	$	(25)	$	71,769
Less: Restricted cash, cash equivalents, and marketable securities (2)	(321)								(378)
Total cash, cash equivalents, and marketable securities	$	55,021							$	71,391

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(1)The related unrealized gain (loss) recorded in “Other income (expense), net” was $14 million and $235 million in Q2 2019 and Q2 2020, and $82 million and $204 million for the six months ended June 30, 2019 and 2020.

(2)We are required to pledge or otherwise restrict a portion of our cash, cash equivalents, and marketable securities as collateral for real estate leases, 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, 2020 (in millions):


	Amortized Cost		Estimated Fair Value
Due within one year	$	42,733	$	42,746
Due after one year through five years	15,671		15,956
Due after five years through ten years	654		656
Due after ten years	2,710		2,723
Total	$	61,768	$	62,081

Actual maturities may differ from the contractual maturities because borrowers may have certain prepayment conditions.

Reconciliation of cash, cash equivalents, and restricted cash

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, 2019		June 30, 2020
Cash and cash equivalents	$	36,092	$	37,466
Restricted cash included in accounts receivable, net and other	276		354
Restricted cash included in other assets	42		22
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$	36,410	$	37,842