Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2019	Apr. 17, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Entity Registrant Name	AMAZON COM INC
Entity Central Index Key	0001018724
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		492,331,776

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Statement of Cash Flows [Abstract]
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, BEGINNING OF PERIOD	$ 32,173	$ 21,856	$ 17,616	$ 16,301
OPERATING ACTIVITIES:
Net income	3,561	1,629	12,005	3,938
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization of property and equipment and capitalized content costs, operating lease assets, and other	4,854	3,671	16,524	12,714
Stock-based compensation	1,274	1,182	5,509	4,605
Other operating expense (income), net	(13)	56	205	216
Other expense (income), net	(135)	(184)	268	(437)
Deferred income taxes	415	141	714	134
Changes in operating assets and liabilities:
Inventories	719	2,220	(2,815)	(2,309)
Accounts receivable, net and other	(401)	1,029	(6,043)	(4,716)
Accounts payable	(6,384)	(10,216)	7,095	3,749
Accrued expenses and other	(2,932)	(2,225)	(235)	(538)
Unearned revenue	888	906	1,133	838
Net cash provided by (used in) operating activities	1,846	(1,791)	34,360	18,194
INVESTING ACTIVITIES:
Purchases of property and equipment	(3,290)	(3,098)	(13,619)	(12,905)
Proceeds from property and equipment incentives	569	371	2,303	1,981
Acquisitions, net of cash acquired, and other	(1,169)	(13)	(3,342)	(13,939)
Sales and maturities of marketable securities	2,643	2,677	8,205	10,444
Purchases of marketable securities	(6,876)	(470)	(13,506)	(11,846)
Net cash provided by (used in) investing activities	(8,123)	(533)	(19,959)	(26,265)
FINANCING ACTIVITIES:
Proceeds from long-term debt and other	190	125	833	16,332
Repayments of long-term debt and other	(351)	(202)	(817)	(1,463)
Principal repayments of finance leases	(2,214)	(2,015)	(7,649)	(5,981)
Principal repayments of financing obligations	(2)	(72)	(266)	(235)
Net cash provided by (used in) financing activities	(2,377)	(2,164)	(7,899)	8,653
Foreign currency effect on cash, cash equivalents, and restricted cash	(12)	248	(611)	733
Net increase (decrease) in cash, cash equivalents, and restricted cash	(8,666)	(4,240)	5,891	1,315
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, END OF PERIOD	23,507	17,616	23,507	17,616
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for interest on long-term debt	286	282	858	607
Cash paid for operating leases	709	0	709	0
Cash paid for interest on finance leases	165	75	471	234
Cash paid for interest on financing obligations	2	54	142	153
Cash paid for income taxes, net of refunds	168	513	840	1,224
Assets acquired under operating leases	875	0	875	0
Property and equipment acquired under finance leases	2,628	2,270	10,972	10,020
Property and equipment acquired under build-to-suit arrangements	$ 436	$ 741	$ 3,336	$ 3,081

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Total net sales	$ 59,700	$ 51,042
Operating expenses:
Cost of sales	33,920	30,735
Fulfillment	8,601	7,792
Marketing	3,664	2,699
Technology and content	7,927	6,759
General and administrative	1,173	1,067
Other operating expense, net		63
Other operating income, net	(5)
Total operating expenses	55,280	49,115
Operating income	4,420	1,927
Interest income	183	80
Interest expense	(366)	(330)
Other income (expense), net	164	239
Total non-operating income (expense)	(19)	(11)
Income before income taxes	4,401	1,916
Provision for income taxes	(836)	(287)
Equity-method investment activity, net of tax	(4)	0
Net income	$ 3,561	$ 1,629
Basic earnings per share	$ 7.24	$ 3.36
Diluted earnings per share	$ 7.09	$ 3.27
Weighted-average shares used in computation of earnings per share:
Basic (in shares)	491	484
Diluted (in shares)	502	498
Product [Member]
Total net sales	$ 34,283	$ 31,605
Service [Member]
Total net sales	$ 25,417	$ 19,437

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 3,561	$ 1,629
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax of $21 and $(1)	(8)	59
Net change in unrealized gains (losses) on available-for-sale debt securities:
Unrealized gains (losses), net of tax of $9 and $0	32	(44)
Reclassification adjustment for losses (gains) included in “Other income (expense), net,” net of tax of $0 and $0	1	2
Net unrealized gains (losses) on available-for-sale debt securities	33	(42)
Total other comprehensive income (loss)	25	17
Comprehensive income	$ 3,586	$ 1,646

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax	$ (1)	$ 21
Unrealized gains (losses), tax	0	9
Reclassification adjustment for losses (gains) included in “Other income (expense), net,” tax	$ 0	$ 0

Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 23,115	$ 31,750
Marketable securities	13,905	9,500
Inventories	16,432	17,174
Accounts receivable, net and other	15,979	16,677
Total current assets	69,431	75,101
Property and equipment, net	61,048	61,797
Operating leases	20,132	0
Goodwill	14,708	14,548
Other assets	12,783	11,202
Total assets	178,102	162,648
Current liabilities:
Accounts payable	31,809	38,192
Accrued expenses and other	24,588	23,663
Unearned revenue	7,298	6,536
Total current liabilities	63,695	68,391
Long-term lease liabilities	33,275	9,650
Long-term debt	23,322	23,495
Other long-term liabilities	9,400	17,563
Commitments and contingencies (Note 4)
Stockholders’ equity:
Preferred stock, $0.01 par value: Authorized shares - 500 Issued and outstanding shares - none	0	0
Common stock, $0.01 par value: Authorized shares - 5,000 Issued shares - 514 and 516 Outstanding shares - 491 and 492	5	5
Treasury stock, at cost	(1,837)	(1,837)
Additional paid-in capital	28,059	26,791
Accumulated other comprehensive loss	(1,010)	(1,035)
Retained earnings	23,193	19,625
Total stockholders’ equity	48,410	43,549
Total liabilities and stockholders’ equity	$ 178,102	$ 162,648

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred stock, par value (in usd per share)	$ 0.01	$ 0.01
Preferred stock, authorized shares	500,000,000	500,000,000
Preferred stock, issued shares	0	0
Preferred stock, outstanding shares	0	0
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, authorized shares	5,000,000,000	5,000,000,000
Common stock, issued shares	516,000,000	514,000,000
Common stock, outstanding shares	492,000,000	491,000,000

Accounting Policies

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Accounting Policies

ACCOUNTING POLICIES

Unaudited Interim Financial Information

We have prepared the accompanying consolidated financial statements pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for interim financial reporting. These consolidated financial statements are unaudited and, in our opinion, include all adjustments, consisting of normal recurring adjustments and accruals necessary for a fair presentation of our consolidated balance sheets, operating results, and cash flows for the periods presented. Operating results for the periods presented are not necessarily indicative of the results that may be expected for 2019 due to seasonal and other factors. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) have been omitted in accordance with the rules and regulations of the SEC. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and accompanying notes in Item 8 of Part II, “Financial Statements and Supplementary Data,” of our 2018 Annual Report on Form 10-K.

Prior Period Reclassifications

Certain prior period amounts have been reclassified to conform to the current period presentation, including the reclassification of long-term capital lease obligations that existed at December 31, 2018 from “Other long-term liabilities” to “Long-term lease liabilities” within the consolidated balance sheets, as a result of the adoption of new accounting guidance for leases. See “Accounting Pronouncements Recently Adopted.”

Principles of Consolidation

The consolidated financial statements include the accounts of Amazon.com, Inc., its wholly-owned subsidiaries, and those entities in which we have a variable interest and of which we are the primary beneficiary, including certain entities in India and China and that support our seller lending financing activities (collectively, the “Company”). Intercompany balances and transactions between consolidated entities are eliminated.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses, and related disclosures of contingent liabilities in the consolidated financial statements and accompanying notes. Estimates are used for, but not limited to, income taxes, commitments and contingencies, valuation of acquired intangibles and goodwill, stock-based compensation forfeiture rates, vendor funding, and inventory valuation. Actual results could differ materially from those estimates.

Earnings per Share

Basic earnings per share is calculated using our weighted-average outstanding common shares. Diluted earnings per share is calculated using our weighted-average outstanding common shares including the dilutive effect of stock awards as determined under the treasury stock method. In periods when we have a net loss, stock awards are excluded from our calculation of earnings per share as their inclusion would have an antidilutive effect.

The following table shows the calculation of diluted shares (in millions):



	Three Months Ended March 31,
	2018	2019
Shares used in computation of basic earnings per share	484	491
Total dilutive effect of outstanding stock awards	14	11
Shares used in computation of diluted earnings per share	498	502

Accounts Receivable, Net and Other

Included in “Accounts receivable, net and other” on our consolidated balance sheets are amounts primarily related to customers, vendors, and sellers. As of December 31, 2018 and March 31, 2019, customer receivables, net, were $9.4 billion and $9.8 billion, vendor receivables, net, were $3.2 billion and $2.5 billion, and seller receivables, net, were $710 million and $660 million. Seller receivables are amounts due from sellers related to our seller lending program, which provides funding to sellers primarily to procure inventory.

Leases

We categorize leases with contractual terms longer than twelve months as either operating or finance. Finance leases are generally those leases that allow us to substantially utilize or pay for the entire asset over its estimated life. Assets acquired under finance leases are recorded in property and equipment, net. All other leases are categorized as operating leases. Our leases generally have terms that range from two to ten years for equipment and two to twenty years for property.

Certain lease contracts include obligations to pay for other services, such as operations and maintenance. For leases of property, we account for these other services as a component of the lease. For substantially all other leases, the services are accounted for separately and we allocate payments to the lease and other services components based on estimated stand-alone prices.

Lease liabilities are recognized at the present value of the fixed lease payments, reduced by landlord incentives using a discount rate based on similarly secured borrowings available to us. Lease assets are recognized based on the initial present value of the fixed lease payments, reduced by landlord incentives, plus any direct costs from executing the leases. Lease assets are tested for impairment in the same manner as long-lived assets used in operations. Leasehold improvements are capitalized at cost and amortized over the lesser of their expected useful life or the lease term.

When we have the option to extend the lease term, terminate the lease before the contractual expiration date, or purchase the leased asset, and it is reasonably certain that we will exercise the option, we consider these options in determining the classification and measurement of the lease. Our leases may include variable payments based on measures that include changes in price indices, market interest rates, or the level of sales at a physical store, which are expensed as incurred.

Costs associated with operating lease assets are recognized on a straight-line basis within operating expenses over the term of the lease. Finance lease assets are amortized within operating expenses on a straight-line basis over the shorter of the estimated useful lives of the assets or the lease term. The interest component of a finance lease is included in interest expense and recognized using the effective interest method over the lease term.

Financing Obligations

We record assets and liabilities for estimated construction costs under build-to-suit lease arrangements when we have control over the building during the construction period. If we continue to control the building after the construction period, the arrangement is classified as a financing obligation instead of a lease. The building is depreciated over the shorter of its useful life or the term of the obligation.

If we do not control the building after the construction period ends, the assets and liabilities for construction costs are derecognized, and we classify the lease as either operating or finance.

Digital Video and Music Content

We obtain video content, inclusive of episodic television and movies, and music content for customers through licensing agreements that have a wide range of licensing provisions including both fixed and variable payment schedules. When the license fee for a specific video or music title is determinable or reasonably estimable and the content is available to us, we recognize an asset and a corresponding liability for the amounts owed. We reduce the liability as payments are made and we amortize the asset to “Cost of sales” on an accelerated basis, based on estimated usage or viewing patterns, or on a straight-line basis. If the licensing fee is not determinable or reasonably estimable, no asset or liability is recorded and licensing costs are expensed as incurred. We also develop original video content for which the production costs are capitalized and amortized to “Cost of sales” predominantly on an accelerated basis that follows the viewing patterns associated with the content. The weighted average remaining life of our capitalized video content is 2.6 years.

Our produced and licensed video content is primarily monetized together as a unit, referred to as a film group, in each major geography where we offer Amazon Prime memberships. These film groups are evaluated for impairment whenever an event occurs or circumstances change indicating the fair value is less than the carrying value. The total capitalized costs of video, which is primarily released content, and music as of December 31, 2018 and March 31, 2019 were $3.8 billion and $4.2 billion. Total video and music expense was $1.5 billion and $1.7 billion in Q1 2018 and Q1 2019. Total video and music expense includes licensing and production costs associated with content offered within Amazon Prime memberships, and costs associated with digital subscriptions and sold or rented content.

Unearned Revenue

Unearned revenue is recorded when payments are received or due in advance of performing our service obligations and is recognized over the service period. Unearned revenue primarily relates to prepayments of AWS services and Amazon Prime memberships. Our total unearned revenue as of December 31, 2018 was $7.9 billion, of which $2.8 billion was recognized as revenue during the three months ended March 31, 2019. Included in “Other long-term liabilities” on our consolidated balance sheets was $1.4 billion of unearned revenue as of December 31, 2018 and March 31, 2019.

Additionally, we have performance obligations, primarily related to AWS, associated with commitments in customer contracts for future services that have not yet been recognized in our financial statements. For contracts with original terms that exceed one year, those commitments not yet recognized were $21.6 billion as of March 31, 2019. The weighted average remaining life of our long-term contracts is 3.3 years. However, the amount and timing of revenue recognition is largely driven by customer usage, which can extend beyond the original contractual term.

Accounting Pronouncements Recently Adopted

In February 2016, the Financial Accounting Standards Board (“FASB”) issued an Accounting Standards Update (“ASU”) amending the accounting for leases, primarily requiring the recognition of lease assets and liabilities for operating leases with terms of more than twelve months on our consolidated balance sheets. Under the new guidance, leases previously described as capital lease obligations and finance lease obligations are now referred to as finance leases and financing obligations, respectively. We adopted this ASU on January 1, 2019 by recording an immaterial cumulative adjustment to retained earnings rather than retrospectively adjusting prior periods. Prior period amounts were not adjusted and continue to be reported in accordance with our historic accounting policies resulting in a balance sheet presentation that is not comparable to the prior period in the first year of adoption. The adoption of this ASU resulted in the recognition of operating lease assets and liabilities of approximately $21 billion, which included the reclassification of finance lease obligations to operating leases of $1.2 billion. As of December 31, 2018, amounts related to finance lease obligations and construction liabilities totaled $9.6 billion, of which $1.5 billion was derecognized for buildings that we do not control during the construction period and $5.4 billion and $1.5 billion were reclassified to finance leases and operating leases, respectively.

In March 2019, the FASB issued an ASU amending the accounting for film costs, inclusive of episodic television and movie costs. The new guidance aligns the accounting for production costs of episodic television with that of movies by requiring production costs to be capitalized. Previously, we only capitalized a portion of the production costs related to our produced episodic television content. We adopted this ASU as of January 1, 2019 and began capitalizing substantially all of our production costs. Adoption of this ASU resulted in approximately $130 million of incremental capitalized film costs classified in “Other Assets” for the period ended March 31, 2019.

Financial Instruments

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Financial Instruments

Note 2 — FINANCIAL INSTRUMENTS

Cash, Cash Equivalents, Restricted Cash, and Marketable Securities

As of December 31, 2018 and March 31, 2019, our cash, cash equivalents, restricted cash, and marketable securities primarily consisted of cash, AAA-rated money market funds, U.S. and foreign government and agency securities, and other investment grade securities. Cash equivalents and marketable securities are recorded at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. To increase the comparability of fair value measures, the following hierarchy prioritizes the inputs to valuation methodologies used to measure fair value:

Level 1—Valuations based on quoted prices for identical assets and liabilities in active markets.

Level 2—Valuations based on observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data.

Level 3—Valuations based on unobservable inputs reflecting our own assumptions, consistent with reasonably available assumptions made by other market participants. These valuations require significant judgment.

We measure the fair value of money market funds and certain marketable equity securities based on quoted prices in active markets for identical assets or liabilities. Other marketable securities were valued either based on recent trades of securities in inactive markets or based on quoted market prices of similar instruments and other significant inputs derived from or corroborated by observable market data. We did not hold any cash, cash equivalents, restricted cash, or marketable securities categorized as Level 3 assets as of December 31, 2018 and March 31, 2019.

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, 2018			March 31, 2019
	Total Estimated Fair Value			Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Total Estimated Fair Value
Cash	$	10,406		$	8,635	$	—	$	—		$	8,635
Level 1 securities:
Money market funds	12,515			9,515		—		—			9,515
Equity securities (1)	170										263
Level 2 securities:
Foreign government and agency securities	815			1,382		—		—			1,382
U.S. government and agency securities	11,667			8,864		3		(13		)	8,854
Corporate debt securities	4,990			7,396		8		(6		)	7,398
Asset-backed securities	892			1,166		3		(2		)	1,167
Other fixed income securities	188			201		—		(1		)	200
Equity securities (1)	33										—
	$	41,676		$	37,159	$	14	$	(22	)	$	37,414
Less: Restricted cash, cash equivalents, and marketable securities (2)	(426		)								(394		)
Total cash, cash equivalents, and marketable securities	$	41,250									$	37,020

___________________


(1)	The related unrealized gain (loss) recorded in “Other income (expense), net” was $68 million in Q1 2019.

(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.”

The following table summarizes the remaining contractual maturities of our cash equivalents and marketable fixed income securities as of March 31, 2019 (in millions):



	Amortized Cost		Estimated Fair Value
Due within one year	$	23,482	$	23,478
Due after one year through five years	4,274		4,277
Due after five years through ten years	190		190
Due after ten years	578		571
Total	$	28,524	$	28,516

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

Equity Warrants and Non-Marketable Equity Securities

We hold equity warrants giving us the right to acquire stock of other companies. As of December 31, 2018 and March 31, 2019, these warrants had a fair value of $440 million and $594 million, and are recorded within “Other assets” on our consolidated balance sheets. The related gain (loss) recorded in “Other income (expense), net” was $45 million and $89 million in Q1 2018 and Q1 2019. These assets are primarily classified as Level 2 assets.

As of December 31, 2018 and March 31, 2019, equity securities not accounted for under the equity method and without readily determinable fair values, had a carrying value of $282 million and $888 million.

Consolidated Statements of Cash Flows Reconciliation

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, 2018		March 31, 2019
Cash and cash equivalents	$	31,750	$	23,115
Restricted cash included in accounts receivable, net and other	418		359
Restricted cash included in other assets	5		33
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$	32,173	$	23,507

Leases

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Leases

LEASES

Gross assets recorded under finance leases, included in “Property and equipment, net,” were $36.1 billion and $46.5 billion as of December 31, 2018 and March 31, 2019. Accumulated amortization associated with finance leases was $19.8 billion and $23.0 billion as of December 31, 2018 and March 31, 2019.

Lease cost recognized in our consolidated statements of operations is summarized as follows (in millions):



	Three Months Ended March 31, 2019

Operating lease cost (1)	$	836
Finance lease cost:
Amortization of lease assets	2,307
Interest on lease liabilities	156
Finance lease cost	2,463
Variable lease cost	250
Total lease cost	$	3,549

__________________


(1)	Rental expense under operating lease agreements was $791 million for Q1 2018.

Other information about lease amounts recognized in our consolidated financial statements is summarized as follows:



	March 31, 2019

Weighted-average remaining lease term – operating leases	11.4 years
Weighted-average remaining lease term – finance leases	5.7 years
Weighted-average discount rate – operating leases	3.2	%
Weighted-average discount rate – finance leases	2.9	%

As of March 31, 2019, our lease liabilities were as follows (in millions):



	Operating Leases			Finance Leases			Total

Gross lease liabilities	$	26,731		$	25,004		$	51,735
Less: imputed interest	(5,850		)	(1,810		)	(7,660		)
Present value of lease liabilities	20,881			23,194			44,075
Less: current portion of lease liabilities	(2,490		)	(8,310		)	(10,800		)
Total long-term lease liabilities	$	18,391		$	14,884		$	33,275

Commitments and Contingencies

3 Months Ended

Mar. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES

Commitments

We have entered into non-cancellable operating and finance leases and financing obligations for equipment and office, fulfillment, sortation, delivery, data center, physical store, and renewable energy facilities.

The following summarizes our principal contractual commitments, excluding open orders for purchases that support normal operations and are generally cancellable, as of March 31, 2019 (in millions):



	Nine Months Ended December 31,		Year Ended December 31,
	2019		2020		2021		2022		2023		Thereafter		Total
Debt principal and interest	$	1,992	$	2,161	$	1,874	$	2,090	$	1,794	$	30,014	$	39,925
Operating leases	2,355		3,077		2,794		2,473		2,214		13,818		26,731
Finance lease liabilities, including interest	6,247		7,268		4,218		1,444		1,022		4,805		25,004
Financing obligations, including interest	15		23		23		24		24		313		422
Unconditional purchase obligations (1)	2,272		3,845		3,314		3,057		2,931		5,148		20,567
Other commitments (2) (3)	2,409		2,154		1,450		1,188		1,015		10,451		18,667
Total commitments	$	15,290	$	18,528	$	13,673	$	10,276	$	9,000	$	64,549	$	131,316

___________________

(1)

Includes unconditional purchase obligations related to certain products offered in our Whole Foods Market stores and long-term agreements to acquire and license digital media content that are not reflected on the consolidated balance sheets. For those digital media content agreements with variable terms, we do not estimate the total obligation beyond any minimum quantities and/or pricing as of the reporting date. Purchase obligations associated with renewal provisions solely at the option of the content provider are included to the extent such commitments are fixed or a minimum amount is specified.


(2)	Includes the estimated timing and amounts of payments for rent and tenant improvements associated with build-to-suit lease arrangements and lease arrangements prior to the lease commencement date and digital media content liabilities associated with long-term digital media content assets with initial terms greater than one year.


(3)	Excludes approximately $3.6 billion of accrued tax contingencies for which we cannot make a reasonably reliable estimate of the amount and period of payment, if any.

Pledged Assets

As of December 31, 2018 and March 31, 2019, we have pledged or otherwise restricted $575 million and $609 million of our cash, cash equivalents, and marketable securities, and certain property and equipment as collateral for real estate leases, amounts due to third-party sellers in certain jurisdictions, debt, and standby and trade letters of credit.

Other Contingencies

In 2016, we determined that we processed and delivered orders of consumer products for certain individuals and entities located outside Iran covered by the Iran Threat Reduction and Syria Human Rights Act or other United States sanctions and export control laws. The consumer products included books, music, other media, apparel, home and kitchen, health and beauty, jewelry, office, consumer electronics, software, lawn and patio, grocery, and automotive products. Our review is ongoing and we have voluntarily reported these orders to the United States Treasury Department’s Office of Foreign Assets Control and the United States Department of Commerce’s Bureau of Industry and Security. We intend to cooperate fully with OFAC and BIS with respect to their review, which may result in the imposition of penalties. For additional information, see Item 5 of Part II, “Other Information — Disclosure Pursuant to Section 13(r) of the Exchange Act.”

We are subject to claims related to various indirect taxes (such as sales, value added, consumption, service, and similar taxes), including in jurisdictions in which we already collect and remit such taxes. If the relevant taxing authorities were successfully to pursue these claims, we could be subject to significant additional tax liabilities. For example, in June 2017, the State of South Carolina issued an assessment for uncollected sales and use taxes for the period from January 2016 to March 2016, including interest and penalties. South Carolina is alleging that we should have collected sales and use taxes on transactions by our third-party sellers. We believe the assessment is without merit. If South Carolina or other states were successfully to seek additional adjustments of a similar nature, we could be subject to significant additional tax liabilities. We intend to defend ourselves vigorously in this matter.

Legal Proceedings

The Company is involved from time to time in claims, proceedings, and litigation, including the matters described in Item 8 of Part II, “Financial Statements and Supplementary Data — Note 7 — Commitments and Contingencies — Legal Proceedings” of our 2018 Annual Report on Form 10-K as supplemented by the following:

In November 2018, Dynamic Data Technologies, LLC filed a complaint for patent infringement against Amazon.com, Inc., Amazon Web Services, Inc., and Amazon Digital Services, LLC in the United States District Court for the Eastern District of Texas. The complaint alleges, among other things, that products and services with H.265 functionality, including Amazon Elastic Transcoder, AWS Elemental Media Convert, AWS Elemental MediaLive, certain EC2 instances, Amazon CloudFront, Amazon Fire TV, and Amazon Fire tablets, infringe U.S. Patent Nos. 8,135,073, entitled “Enhancing Video Images Depending On Prior Image Enhancements”; 6,774,918, entitled “Video Overlay Processor With Reduced Memory And Bus Performance Requirements”; and 7,571,450, entitled “System For And Method Of Displaying Information.” The complaint also alleges that products and services with H.265 functionality, including AWS Elemental Media Convert, AWS Elemental MediaLive, certain EC2 instances, Amazon CloudFront, and Amazon Fire TV, infringe U.S. Patent Nos. 8,073,054, entitled “Unit For And Method Of Estimating A Current Motion Vector”; 6,996,177, entitled “Motion Estimation”; 8,311,112, entitled “System And Method For Video Compression Using Predictive Coding”; and 7,894,529, entitled “Method And Device For Determining Motion Vectors.” The complaint also alleges that products and services for encoding video data, including Amazon Elastic Transcoder and Amazon Video, infringe U.S. Patent No. 8,184,689, entitled “Method Video Encoding And Decoding Preserving Cache Localities,” and that products and services with VP9 encoding functionality, including Amazon Elastic Transcoder and Amazon Fire TV, infringe U.S. Patent No. 7,519,230, entitled “Background Motion Vector Detection.” In February 2019, Dynamic Data Technologies filed an amended complaint. The amended complaint adds allegations that products and services with H.265 image encoding functionality, including Amazon Elastic Transcoder, AWS Elemental Media Convert, AWS Elemental MediaLive, and Amazon Fire TV, infringe U.S. Patent No. 6,639,944, entitled “Sub-Pixel Accurate Motion Vector Estimation And Compensated Interpolation.” The amended complaint also adds allegations that products and services with H.265 functionality, including AWS Elemental Media Convert, AWS Elemental MediaLive, certain EC2 instances, Amazon CloudFront, and Amazon Fire TV, infringe U.S. Patent Nos. 6,782,054, entitled “Method And Apparatus For Motion Vector Estimation,” and 7,010,039, entitled “Motion Estimator For Reduced Halos In MC Up-Conversion.” The amended complaint also adds allegations that products and services with H.265 functionality, including Amazon Elastic Transcoder, AWS Elemental Media Convert, AWS Elemental MediaLive, certain EC2 instances, Amazon CloudFront, Amazon Fire TV, and Amazon Fire tablets, infringe U.S. Patent No. 8,189,105, entitled “Systems And Methods Of Motion And Edge Adaptive Processing Including Motion Compensation Features,” and that products and services with VP9 image processing functionality, including Amazon Elastic Transcoder and Amazon Fire TV, infringe U.S. Patent No. 7,058,227, entitled “Problem Area Location In An Image Signal.” The amended complaint seeks an unspecified amount of damages, enhanced damages, and attorneys’ fees. We dispute the allegations of wrongdoing and intend to defend ourselves vigorously in this matter.

In January 2019, Saint Lawrence Communications, LLC filed a complaint against Amazon.com, Inc. and Amazon.com LLC in the United States District Court for the Eastern District of Texas. The complaint alleges, among other things, that voice encoding functionality in Amazon devices infringes U.S. Patent Nos. 6,795,805, entitled “Periodicity Enhancement In Decoding Wideband Signals”; 6,807,524, entitled “Perceptual Weighting Device And Method For Efficient Coding Of Wideband Signals”; 7,151,802, entitled “High Frequency Content Recovering Method And Device For Over-Sampled Synthesized Wideband Signal”; 7,191,123, entitled “Gain-Smoothing In Wideband Speech And Audio Signal Decoder”; and 7,260,521, entitled “Method And Device For Adaptive Bandwidth Pitch Search In Coding Wideband Signals.” The complaint seeks an unspecified amount of damages, enhanced damages, attorneys’ fees, costs, and interest. We dispute the allegations of wrongdoing and intend to defend ourselves vigorously in this matter.

In March 2019, Data Scape, LLC filed a petition with the United States International Trade Commission requesting that the International Trade Commission commence an investigation into the sale of certain Amazon-branded devices, including Kindle e-readers, Fire tablets, FireTV devices, and the Echo Spot and Echo Show (“accused devices”). Data Scape’s petition alleges that, when used on the accused devices, Amazon Photo, Amazon Drive, Amazon Music, and book delivery infringe U.S. Patent Nos. 7,720,929; 7,617,537; and 8,386,581, each entitled “Communication System And Its Method And Communication Apparatus And Its Method.” Data Scape is seeking a general exclusion order preventing the importation of the accused devices into the United States. We dispute the allegations of wrongdoing and intend to defend ourselves vigorously in this matter.

In April 2019, Vocalife LLC filed a complaint against Amazon.com, Inc. and Amazon.com LLC in the United States District Court for the Eastern District of Texas. The complaint alleges, among other things, that Amazon Echo devices infringe U.S. Patent No. RE47,049, entitled “Microphone Array System.” The complaint seeks injunctive relief, an unspecified amount of damages, attorneys’ fees, costs, and interest. We dispute the allegations of wrongdoing and intend to defend ourselves vigorously in this matter.

The outcomes of our legal proceedings and other contingencies are inherently unpredictable, subject to significant uncertainties, and could be material to our operating results and cash flows for a particular period. In addition, for the matters we disclose that do not include an estimate of the amount of loss or range of losses, such an estimate is not possible or is immaterial, and we may be unable to estimate the possible loss or range of losses that could potentially result from the application of non-monetary remedies.

See also “Note 7 — Income Taxes.”

Long-Term Debt

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Long-Term Debt

DEBT

As of March 31, 2019, we had $24.3 billion of unsecured senior notes outstanding (the “Notes”). As of December 31, 2018 and March 31, 2019, the net unamortized discount and debt issuance costs on the Notes was $101 million. We also have other long-term debt with a carrying amount, including the current portion and borrowings under our credit facility, of $715 million and $781 million as of December 31, 2018 and March 31, 2019. The face value of our total long-term debt obligations is as follows (in millions):



	December 31, 2018			March 31, 2019
2.600% Notes due on December 5, 2019 (2)	1,000			1,000
1.900% Notes due on August 21, 2020 (3)	1,000			1,000
3.300% Notes due on December 5, 2021 (2)	1,000			1,000
2.500% Notes due on November 29, 2022 (1)	1,250			1,250
2.400% Notes due on February 22, 2023 (3)	1,000			1,000
2.800% Notes due on August 22, 2024 (3)	2,000			2,000
3.800% Notes due on December 5, 2024 (2)	1,250			1,250
5.200% Notes due on December 3, 2025 (4)	1,000			1,000
3.150% Notes due on August 22, 2027 (3)	3,500			3,500
4.800% Notes due on December 5, 2034 (2)	1,250			1,250
3.875% Notes due on August 22, 2037 (3)	2,750			2,750
4.950% Notes due on December 5, 2044 (2)	1,500			1,500
4.050% Notes due on August 22, 2047 (3)	3,500			3,500
4.250% Notes due on August 22, 2057 (3)	2,250			2,250
Credit Facility	594			539
Other long-term debt	121			242
Total debt	24,965			25,031
Less current portion of long-term debt	(1,371		)	(1,608		)
Face value of long-term debt	$	23,594		$	23,423

_____________________________


(1)	Issued in November 2012, effective interest rate of the 2022 Notes was 2.66%.


(2)	Issued in December 2014, effective interest rates of the 2019, 2021, 2024, 2034, and 2044 Notes were 2.73%, 3.43%, 3.90%, 4.92%, and 5.11%.


(3)	Issued in August 2017, effective interest rates of the 2020, 2023, 2024, 2027, 2037, 2047, and 2057 Notes were 2.16%, 2.56%, 2.95%, 3.25%, 3.94%, 4.13%, and 4.33%.


(4)	Consists of $872 million of 2025 Notes issued in December 2017 in exchange for notes assumed in connection with the acquisition of Whole Foods Market and $128 million of 2025 Notes issued by Whole Foods Market that did not participate in our December 2017 exchange offer. The effective interest rate of the 2025 Notes was 3.02%.

Interest on the Notes issued in 2012 is payable semi-annually in arrears in May and November. Interest on the Notes issued in 2014 is payable semi-annually in arrears in June and December. Interest on the Notes issued in 2017 is payable semi-annually in arrears in February and August. Interest on the 2025 Notes is payable semi-annually in arrears in June and December. We may redeem the Notes at any time in whole, or from time to time, in part at specified redemption prices. We are not subject to any financial covenants under the Notes. The proceeds from the November 2012 and the December 2014 Notes were used for general corporate purposes. The proceeds from the August 2017 Notes were used to fund the consideration for the acquisition of Whole Foods Market, to repay notes due in 2017, and for general corporate purposes. The estimated fair value of the Notes was approximately $24.3 billion and $25.5 billion as of December 31, 2018 and March 31, 2019, which is based on Level 2 inputs.

In October 2016, we entered into a $500 million secured revolving credit facility with a lender that is secured by certain seller receivables, which we subsequently increased to $620 million and may from time to time increase in the future subject to lender approval (the “Credit Facility”). The Credit Facility is available for a term of three years, bears interest at the London interbank offered rate (“LIBOR”) plus 1.65%, and has a commitment fee of 0.50% on the undrawn portion. There were $594 million and $539 million of borrowings outstanding under the Credit Facility as of December 31, 2018 and March 31, 2019, with weighted-average interest rates of 3.2% and 3.3% as of December 31, 2018 and March 31, 2019. As of December 31, 2018 and March 31, 2019, we have pledged $686 million and $630 million of our cash and seller receivables as collateral for debt related to our Credit Facility. The estimated fair value of the Credit Facility, which is based on Level 2 inputs, approximated its carrying value as of December 31, 2018 and March 31, 2019.

Other long-term debt, including the current portion, had a weighted-average interest rate of 6.0% and 5.5% as of December 31, 2018 and March 31, 2019. We used the net proceeds from the issuance of this debt primarily to fund certain business operations. The estimated fair value of other long-term debt, which is based on Level 2 inputs, approximated its carrying value as of December 31, 2018 and March 31, 2019.

In April 2018, we established a commercial paper program (the “Commercial Paper Program”) under which we may from time to time issue unsecured commercial paper up to a total of $7.0 billion at any time, with individual maturities that may vary but will not exceed 397 days from the date of issue. There were no borrowings outstanding under the Commercial Paper Program as of December 31, 2018 and March 31, 2019.

In April 2018, in connection with our Commercial Paper Program, we amended and restated our unsecured revolving credit facility (the “Credit Agreement”) with a syndicate of lenders to increase our borrowing capacity thereunder to $7.0 billion. As amended and restated, the Credit Agreement has a term of three years, but it may be extended for up to three additional one-year terms if approved by the lenders. The interest rate applicable to outstanding balances under the amended and restated Credit Agreement is LIBOR plus 0.50%, with a commitment fee of 0.04% on the undrawn portion of the credit facility. There were no borrowings outstanding under the Credit Agreement as of December 31, 2018 and March 31, 2019.

Stockholders' Equity

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Stockholders' Equity

STOCKHOLDERS’ EQUITY

Stock Repurchase Activity

In February 2016, the Board of Directors authorized a program to repurchase up to $5.0 billion of our common stock, with no fixed expiration. There were no repurchases of common stock in Q1 2018 or Q1 2019.

Stock Award Activity

Common shares outstanding plus shares underlying outstanding stock awards totaled 507 million as of December 31, 2018 and March 31, 2019. These totals include all vested and unvested stock awards outstanding, including those awards we estimate will be forfeited. Stock-based compensation expense is as follows (in millions):



	Three Months Ended March 31,
	2018		2019
Cost of sales	$	15	$	24
Fulfillment	244		234
Marketing	161		209
Technology and content	631		675
General and administrative	132		132
Total stock-based compensation expense	$	1,183	$	1,274

The following table summarizes our restricted stock unit activity for the three months ended March 31, 2019 (in millions):



	Number of Units		Weighted-Average Grant-Date Fair Value
Outstanding as of December 31, 2018	15.9		$	1,024
Units granted	0.6		1,677
Units vested	(1.2	)	627
Units forfeited	(0.4	)	1,023
Outstanding as of March 31, 2019	14.9		$	1,080

Scheduled vesting for outstanding restricted stock units as of March 31, 2019, is as follows (in millions):



	Nine Months Ended December 31,	Year Ended December 31,
	2019	2020	2021	2022	2023	Thereafter	Total
Scheduled vesting—restricted stock units	5.6	5.5	2.5	1.0	0.2	0.1	14.9

As of March 31, 2019, there was $6.1 billion of net unrecognized compensation cost related to unvested stock-based compensation arrangements. This compensation is recognized on an accelerated basis with approximately half of the compensation expected to be expensed in the next twelve months, and has a weighted-average recognition period of 1.1 years. The estimated forfeiture rate as of December 31, 2018 and March 31, 2019 was 27%. Changes in our estimates and assumptions relating to forfeitures may cause us to realize material changes in stock-based compensation expense in the future.

Changes in Stockholders’ Equity

The following table shows the changes in stockholders’ equity (in millions):



	Three Months Ended March 31,
	2018			2019
Total beginning stockholders' equity	$	27,709		$	43,549

Beginning and ending common stock	5			5

Beginning and ending treasury stock	(1,837		)	(1,837		)

Beginning additional paid-in capital	21,389			26,791
Stock-based compensation and issuance of employee benefit plan stock	1,174			1,268
Ending additional paid-in capital	22,563			28,059

Beginning accumulated other comprehensive loss	(484		)	(1,035		)
Other comprehensive income (loss)	17			25
Ending accumulated other comprehensive loss	(467		)	(1,010		)

Beginning retained earnings	8,636			19,625
Cumulative effect of changes in accounting principles (1)	934			7
Net income	1,629			3,561
Ending retained earnings	11,199			23,193

Total ending stockholders’ equity	$	31,463		$	48,410

___________________


(1)	We recorded cumulative effect adjustments related to the new revenue and income tax standards in Q1 2018 and the new lease standard in Q1 2019. See Item 1 of Part I, “Financial Statements — Note 1 — Accounting Policies — Accounting Pronouncements Recently Adopted” for additional information.

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Our tax provision or benefit from income taxes for interim periods is determined using an estimate of our annual effective tax rate, adjusted for discrete items, if any, that are taken into account in the relevant period. Each quarter we update our estimate of the annual effective tax rate, and if our estimated tax rate changes, we make a cumulative adjustment. Our quarterly tax provision, and our quarterly estimate of our annual effective tax rate, is subject to significant variation due to several factors, including variability in accurately predicting our pre-tax and taxable income and loss and the mix of jurisdictions to which they relate, intercompany transactions, the applicability of special tax regimes, changes in how we do business, acquisitions, investments, audit-related developments, changes in our stock price, changes in our deferred tax assets and liabilities and their valuation, foreign currency gains (losses), changes in statutes, regulations, case law, and administrative practices, principles, and interpretations related to tax, including changes to the global tax framework, competition, and other laws and accounting rules in various jurisdictions, and relative changes of expenses or losses for which tax benefits are not recognized. Additionally, our effective tax rate can be more or less volatile based on the amount of pre-tax income or loss. For example, the impact of discrete items and non-deductible expenses on our effective tax rate is greater when our pre-tax income is lower. For 2019, we estimate that our effective tax rate will be favorably affected by the impact of excess tax benefits from stock-based compensation and the U.S. federal research and development credit and adversely affected by state income taxes and losses incurred in certain foreign jurisdictions for which we may not realize a tax benefit. Losses for which we may not realize a related tax benefit, primarily due to losses of foreign subsidiaries, reduce our pre-tax income without a corresponding reduction in our tax expense, and therefore increase our effective tax rate. We record valuation allowances against the deferred tax assets associated with losses for which we may not realize a related tax benefit. Our income tax provisions for the three months ended March 31, 2018 and March 31, 2019 were $287 million and $836 million, which included $368 million and $261 million of net discrete tax benefits primarily attributable to excess tax benefits from stock-based compensation. Cash paid for income taxes, net of refunds was $513 million and $168 million in Q1 2018 and Q1 2019. As of December 31, 2018 and March 31, 2019, tax contingencies were approximately $3.4 billion and $3.6 billion. We expect the total amount of tax contingencies will grow in 2019. In addition, changes in state, federal, and foreign tax laws may increase our tax contingencies. The timing of the resolution of income tax examinations is highly uncertain, and the amounts ultimately paid, if any, upon resolution of the issues raised by the taxing authorities may differ from the amounts accrued. It is reasonably possible that within the next twelve months we will receive additional assessments by various tax authorities or possibly reach resolution of income tax examinations in one or more jurisdictions. These assessments or settlements could result in changes to our contingencies related to positions on tax filings on prior years’ tax filings. We are under examination, or may be subject to examination, by the Internal Revenue Service (“IRS”) for the calendar year 2005 and thereafter. These examinations may lead to ordinary course adjustments or proposed adjustments to our taxes or our net operating losses with respect to years under examination as well as subsequent periods. As previously disclosed, we have received Notices of Proposed Adjustment (“NOPAs”) from the IRS for transactions undertaken in the 2005 and 2006 calendar years relating to transfer pricing with our foreign subsidiaries. The IRS is seeking to increase our U.S. taxable income by an amount that would result in additional federal tax of approximately $1.5 billion, subject to interest. On March 23, 2017, the U.S. Tax Court issued its decision regarding the issues raised in the IRS NOPAs. The Tax Court rejected the approach from the IRS NOPAs in determining transfer pricing adjustments in 2005 and 2006 for the transactions undertaken with our foreign subsidiaries and adopted, with adjustments, our suggested approach. In September 2017, the IRS appealed the decision to the U.S. Court of Appeals for the Ninth Circuit. We will continue to defend ourselves vigorously in this matter. If the Tax Court decision were reversed on appeal or if the IRS were to successfully assert transfer pricing adjustments of a similar nature to the NOPAs for transactions in subsequent years, we could be subject to significant additional tax liabilities. In October 2014, the European Commission opened a formal investigation to examine whether decisions by the tax authorities in Luxembourg with regard to the corporate income tax paid by certain of our subsidiaries comply with European Union rules on state aid. On October 4, 2017, the European Commission announced its decision that determinations by the tax authorities in Luxembourg did not comply with European Union rules on state aid. Based on that decision the European Commission announced an estimated recovery amount of approximately €250 million, plus interest, for the period May 2006 through June 2014, and ordered Luxembourg tax authorities to calculate the actual amount of additional taxes subject to recovery. Luxembourg computed an initial recovery amount, consistent with the European Commission’s decision, that we deposited into escrow in March 2018, subject to adjustment pending conclusion of all appeals. In December 2017, Luxembourg appealed the European Commission’s decision. In May 2018, we appealed. We believe the European Commission’s decision to be without merit and will continue to defend ourselves vigorously in this matter. We are also subject to taxation in various states and other foreign jurisdictions including China, Germany, India, Japan, Luxembourg, and the United Kingdom. We are under, or may be subject to, audit or examination and additional assessments by the relevant authorities in respect of these particular jurisdictions primarily for 2008 and thereafter.

Segment Information

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Segment Information

SEGMENT INFORMATION

We have organized our operations into three segments: North America, International, and AWS. We allocate to segment results the operating expenses “Fulfillment,” “Marketing,” “Technology and content,” and “General and administrative” based on usage, which is generally reflected in the segment in which the costs are incurred. The majority of technology infrastructure costs are allocated to the AWS segment based on usage. The majority of the remaining non-infrastructure technology costs are incurred in the U.S. and are allocated to our North America segment. There are no internal revenue transactions between our reportable segments. These segments reflect the way our chief operating decision maker evaluates the Company’s business performance and manages its operations.

North America

The North America segment primarily consists of amounts earned from retail sales of consumer products (including from sellers) and subscriptions through North America-focused online and physical stores. This segment includes export sales from these online stores.

International

The International segment primarily consists of amounts earned from retail sales of consumer products (including from sellers) and subscriptions through internationally-focused online stores. This segment includes export sales from these internationally-focused online stores (including export sales from these online stores to customers in the U.S., Mexico, and Canada), but excludes export sales from our North America-focused online stores.

AWS

The AWS segment consists of amounts earned from global sales of compute, storage, database, and other service offerings for start-ups, enterprises, government agencies, and academic institutions.

Information on reportable segments and reconciliation to consolidated net income is as follows (in millions):



	Three Months Ended March 31,
	2018			2019
North America
Net sales	$	30,725		$	35,812
Operating expenses	29,576			33,525
Operating income	$	1,149		$	2,287

International
Net sales	$	14,875		$	16,192
Operating expenses	15,497			16,282
Operating income (loss)	$	(622	)	$	(90	)

AWS
Net sales	$	5,442		$	7,696
Operating expenses	4,042			5,473
Operating income	$	1,400		$	2,223

Consolidated
Net sales	$	51,042		$	59,700
Operating expenses	49,115			55,280
Operating income	1,927			4,420
Total non-operating income (expense)	(11		)	(19		)
Provision for income taxes	(287		)	(836		)
Equity-method investment activity, net of tax	—			(4		)
Net income	$	1,629		$	3,561

Net sales by groups of similar products and services, which also have similar economic characteristics, is as follows (in millions):



	Three Months Ended March 31,
	2018		2019
Net Sales:
Online stores (1)	$	26,939	$	29,498
Physical stores (2)	4,263		4,307
Third-party seller services (3)	9,265		11,141
Subscription services (4)	3,102		4,342
AWS	5,442		7,696
Other (5)	2,031		2,716
Consolidated	$	51,042	$	59,700

____________________________

(1)

Includes product sales and digital media content where we record revenue gross. We leverage our retail infrastructure to offer a wide selection of consumable and durable goods that includes media products available in both a physical and digital format, such as books, music, videos, games, and software. These product sales include digital products sold on a transactional basis. Digital product subscriptions that provide unlimited viewing or usage rights are included in Subscription services.


(2)	Includes product sales where our customers physically select items in a store.


(3)	Includes commissions and any related fulfillment and shipping fees, and other third-party seller services.


(4)	Includes annual and monthly fees associated with Amazon Prime memberships, as well as audiobook, digital video, e-book, digital music, and other non-AWS subscription services.


(5)	Primarily includes sales of advertising services, as well as sales related to our other service offerings.

Accounting Policies (Policies)	3 Months Ended
Accounting Policies (Policies)	Mar. 31, 2019
Accounting Policies [Abstract]
Unaudited Interim Financial Information	Unaudited Interim Financial Information We have prepared the accompanying consolidated financial statements pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for interim financial reporting. These consolidated financial statements are unaudited and, in our opinion, include all adjustments, consisting of normal recurring adjustments and accruals necessary for a fair presentation of our consolidated balance sheets, operating results, and cash flows for the periods presented. Operating results for the periods presented are not necessarily indicative of the results that may be expected for 2019 due to seasonal and other factors. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) have been omitted in accordance with the rules and regulations of the SEC. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and accompanying notes in Item 8 of Part II, “Financial Statements and Supplementary Data,” of our 2018 Annual Report on Form 10-K.
Prior Period Reclassifications	Prior Period Reclassifications Certain prior period amounts have been reclassified to conform to the current period presentation, including the reclassification of long-term capital lease obligations that existed at December 31, 2018 from “Other long-term liabilities” to “Long-term lease liabilities” within the consolidated balance sheets, as a result of the adoption of new accounting guidance for leases. See “Accounting Pronouncements Recently Adopted.”
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of Amazon.com, Inc., its wholly-owned subsidiaries, and those entities in which we have a variable interest and of which we are the primary beneficiary, including certain entities in India and China and that support our seller lending financing activities (collectively, the “Company”). Intercompany balances and transactions between consolidated entities are eliminated.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses, and related disclosures of contingent liabilities in the consolidated financial statements and accompanying notes. Estimates are used for, but not limited to, income taxes, commitments and contingencies, valuation of acquired intangibles and goodwill, stock-based compensation forfeiture rates, vendor funding, and inventory valuation. Actual results could differ materially from those estimates.
Earnings per Share	Earnings per Share Basic earnings per share is calculated using our weighted-average outstanding common shares. Diluted earnings per share is calculated using our weighted-average outstanding common shares including the dilutive effect of stock awards as determined under the treasury stock method. In periods when we have a net loss, stock awards are excluded from our calculation of earnings per share as their inclusion would have an antidilutive effect.
Accounts Receivable, Net and Other	Accounts Receivable, Net and Other Included in “Accounts receivable, net and other” on our consolidated balance sheets are amounts primarily related to customers, vendors, and sellers. As of December 31, 2018 and March 31, 2019, customer receivables, net, were $9.4 billion and $9.8 billion, vendor receivables, net, were $3.2 billion and $2.5 billion, and seller receivables, net, were $710 million and $660 million. Seller receivables are amounts due from sellers related to our seller lending program, which provides funding to sellers primarily to procure inventory.
Leases	Leases We categorize leases with contractual terms longer than twelve months as either operating or finance. Finance leases are generally those leases that allow us to substantially utilize or pay for the entire asset over its estimated life. Assets acquired under finance leases are recorded in property and equipment, net. All other leases are categorized as operating leases. Our leases generally have terms that range from two to ten years for equipment and two to twenty years for property. Certain lease contracts include obligations to pay for other services, such as operations and maintenance. For leases of property, we account for these other services as a component of the lease. For substantially all other leases, the services are accounted for separately and we allocate payments to the lease and other services components based on estimated stand-alone prices. Lease liabilities are recognized at the present value of the fixed lease payments, reduced by landlord incentives using a discount rate based on similarly secured borrowings available to us. Lease assets are recognized based on the initial present value of the fixed lease payments, reduced by landlord incentives, plus any direct costs from executing the leases. Lease assets are tested for impairment in the same manner as long-lived assets used in operations. Leasehold improvements are capitalized at cost and amortized over the lesser of their expected useful life or the lease term. When we have the option to extend the lease term, terminate the lease before the contractual expiration date, or purchase the leased asset, and it is reasonably certain that we will exercise the option, we consider these options in determining the classification and measurement of the lease. Our leases may include variable payments based on measures that include changes in price indices, market interest rates, or the level of sales at a physical store, which are expensed as incurred. Costs associated with operating lease assets are recognized on a straight-line basis within operating expenses over the term of the lease. Finance lease assets are amortized within operating expenses on a straight-line basis over the shorter of the estimated useful lives of the assets or the lease term. The interest component of a finance lease is included in interest expense and recognized using the effective interest method over the lease term.
Financing Obligations	Financing Obligations We record assets and liabilities for estimated construction costs under build-to-suit lease arrangements when we have control over the building during the construction period. If we continue to control the building after the construction period, the arrangement is classified as a financing obligation instead of a lease. The building is depreciated over the shorter of its useful life or the term of the obligation. If we do not control the building after the construction period ends, the assets and liabilities for construction costs are derecognized, and we classify the lease as either operating or finance.
Video And Music Content	Digital Video and Music Content We obtain video content, inclusive of episodic television and movies, and music content for customers through licensing agreements that have a wide range of licensing provisions including both fixed and variable payment schedules. When the license fee for a specific video or music title is determinable or reasonably estimable and the content is available to us, we recognize an asset and a corresponding liability for the amounts owed. We reduce the liability as payments are made and we amortize the asset to “Cost of sales” on an accelerated basis, based on estimated usage or viewing patterns, or on a straight-line basis. If the licensing fee is not determinable or reasonably estimable, no asset or liability is recorded and licensing costs are expensed as incurred. We also develop original video content for which the production costs are capitalized and amortized to “Cost of sales” predominantly on an accelerated basis that follows the viewing patterns associated with the content. The weighted average remaining life of our capitalized video content is 2.6 years. Our produced and licensed video content is primarily monetized together as a unit, referred to as a film group, in each major geography where we offer Amazon Prime memberships. These film groups are evaluated for impairment whenever an event occurs or circumstances change indicating the fair value is less than the carrying value. The total capitalized costs of video, which is primarily released content, and music as of December 31, 2018 and March 31, 2019 were $3.8 billion and $4.2 billion. Total video and music expense was $1.5 billion and $1.7 billion in Q1 2018 and Q1 2019. Total video and music expense includes licensing and production costs associated with content offered within Amazon Prime memberships, and costs associated with digital subscriptions and sold or rented content.
Unearned Revenue	Unearned Revenue Unearned revenue is recorded when payments are received or due in advance of performing our service obligations and is recognized over the service period. Unearned revenue primarily relates to prepayments of AWS services and Amazon Prime memberships. Our total unearned revenue as of December 31, 2018 was $7.9 billion, of which $2.8 billion was recognized as revenue during the three months ended March 31, 2019. Included in “Other long-term liabilities” on our consolidated balance sheets was $1.4 billion of unearned revenue as of December 31, 2018 and March 31, 2019. Additionally, we have performance obligations, primarily related to AWS, associated with commitments in customer contracts for future services that have not yet been recognized in our financial statements. For contracts with original terms that exceed one year, those commitments not yet recognized were $21.6 billion as of March 31, 2019. The weighted average remaining life of our long-term contracts is 3.3 years. However, the amount and timing of revenue recognition is largely driven by customer usage, which can extend beyond the original contractual term.
Accounting Pronouncements Recently Adopted	Accounting Pronouncements Recently Adopted In February 2016, the Financial Accounting Standards Board (“FASB”) issued an Accounting Standards Update (“ASU”) amending the accounting for leases, primarily requiring the recognition of lease assets and liabilities for operating leases with terms of more than twelve months on our consolidated balance sheets. Under the new guidance, leases previously described as capital lease obligations and finance lease obligations are now referred to as finance leases and financing obligations, respectively. We adopted this ASU on January 1, 2019 by recording an immaterial cumulative adjustment to retained earnings rather than retrospectively adjusting prior periods. Prior period amounts were not adjusted and continue to be reported in accordance with our historic accounting policies resulting in a balance sheet presentation that is not comparable to the prior period in the first year of adoption. The adoption of this ASU resulted in the recognition of operating lease assets and liabilities of approximately $21 billion, which included the reclassification of finance lease obligations to operating leases of $1.2 billion. As of December 31, 2018, amounts related to finance lease obligations and construction liabilities totaled $9.6 billion, of which $1.5 billion was derecognized for buildings that we do not control during the construction period and $5.4 billion and $1.5 billion were reclassified to finance leases and operating leases, respectively. In March 2019, the FASB issued an ASU amending the accounting for film costs, inclusive of episodic television and movie costs. The new guidance aligns the accounting for production costs of episodic television with that of movies by requiring production costs to be capitalized. Previously, we only capitalized a portion of the production costs related to our produced episodic television content. We adopted this ASU as of January 1, 2019 and began capitalizing substantially all of our production costs. Adoption of this ASU resulted in approximately $130 million of incremental capitalized film costs classified in “Other Assets” for the period ended March 31, 2019.

Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Calculation of Diluted Shares

The following table shows the calculation of diluted shares (in millions):



	Three Months Ended March 31,
	2018	2019
Shares used in computation of basic earnings per share	484	491
Total dilutive effect of outstanding stock awards	14	11
Shares used in computation of diluted earnings per share	498	502

Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Fair Value by Major Security Type

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, 2018			March 31, 2019
	Total Estimated Fair Value			Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Total Estimated Fair Value
Cash	$	10,406		$	8,635	$	—	$	—		$	8,635
Level 1 securities:
Money market funds	12,515			9,515		—		—			9,515
Equity securities (1)	170										263
Level 2 securities:
Foreign government and agency securities	815			1,382		—		—			1,382
U.S. government and agency securities	11,667			8,864		3		(13		)	8,854
Corporate debt securities	4,990			7,396		8		(6		)	7,398
Asset-backed securities	892			1,166		3		(2		)	1,167
Other fixed income securities	188			201		—		(1		)	200
Equity securities (1)	33										—
	$	41,676		$	37,159	$	14	$	(22	)	$	37,414
Less: Restricted cash, cash equivalents, and marketable securities (2)	(426		)								(394		)
Total cash, cash equivalents, and marketable securities	$	41,250									$	37,020

___________________


(1)	The related unrealized gain (loss) recorded in “Other income (expense), net” was $68 million in Q1 2019.

(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 March 31, 2019 (in millions):



	Amortized Cost		Estimated Fair Value
Due within one year	$	23,482	$	23,478
Due after one year through five years	4,274		4,277
Due after five years through ten years	190		190
Due after ten years	578		571
Total	$	28,524	$	28,516

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, 2018		March 31, 2019
Cash and cash equivalents	$	31,750	$	23,115
Restricted cash included in accounts receivable, net and other	418		359
Restricted cash included in other assets	5		33
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$	32,173	$	23,507

Leases (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Lease, Cost

Lease cost recognized in our consolidated statements of operations is summarized as follows (in millions):



	Three Months Ended March 31, 2019

Operating lease cost (1)	$	836
Finance lease cost:
Amortization of lease assets	2,307
Interest on lease liabilities	156
Finance lease cost	2,463
Variable lease cost	250
Total lease cost	$	3,549

__________________


(1)	Rental expense under operating lease agreements was $791 million for Q1 2018.

Other Operating and Finance Lease Information

Other information about lease amounts recognized in our consolidated financial statements is summarized as follows:



	March 31, 2019

Weighted-average remaining lease term – operating leases	11.4 years
Weighted-average remaining lease term – finance leases	5.7 years
Weighted-average discount rate – operating leases	3.2	%
Weighted-average discount rate – finance leases	2.9	%

Operating and Finance Lease Liability Reconciliation

As of March 31, 2019, our lease liabilities were as follows (in millions):



	Operating Leases			Finance Leases			Total

Gross lease liabilities	$	26,731		$	25,004		$	51,735
Less: imputed interest	(5,850		)	(1,810		)	(7,660		)
Present value of lease liabilities	20,881			23,194			44,075
Less: current portion of lease liabilities	(2,490		)	(8,310		)	(10,800		)
Total long-term lease liabilities	$	18,391		$	14,884		$	33,275

Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Principal Contractual Commitments, Excluding Open Orders for Purchases

The following summarizes our principal contractual commitments, excluding open orders for purchases that support normal operations and are generally cancellable, as of March 31, 2019 (in millions):



	Nine Months Ended December 31,		Year Ended December 31,
	2019		2020		2021		2022		2023		Thereafter		Total
Debt principal and interest	$	1,992	$	2,161	$	1,874	$	2,090	$	1,794	$	30,014	$	39,925
Operating leases	2,355		3,077		2,794		2,473		2,214		13,818		26,731
Finance lease liabilities, including interest	6,247		7,268		4,218		1,444		1,022		4,805		25,004
Financing obligations, including interest	15		23		23		24		24		313		422
Unconditional purchase obligations (1)	2,272		3,845		3,314		3,057		2,931		5,148		20,567
Other commitments (2) (3)	2,409		2,154		1,450		1,188		1,015		10,451		18,667
Total commitments	$	15,290	$	18,528	$	13,673	$	10,276	$	9,000	$	64,549	$	131,316

___________________

(1)

Includes unconditional purchase obligations related to certain products offered in our Whole Foods Market stores and long-term agreements to acquire and license digital media content that are not reflected on the consolidated balance sheets. For those digital media content agreements with variable terms, we do not estimate the total obligation beyond any minimum quantities and/or pricing as of the reporting date. Purchase obligations associated with renewal provisions solely at the option of the content provider are included to the extent such commitments are fixed or a minimum amount is specified.


(2)	Includes the estimated timing and amounts of payments for rent and tenant improvements associated with build-to-suit lease arrangements and lease arrangements prior to the lease commencement date and digital media content liabilities associated with long-term digital media content assets with initial terms greater than one year.


(3)	Excludes approximately $3.6 billion of accrued tax contingencies for which we cannot make a reasonably reliable estimate of the amount and period of payment, if any.

Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Long-Term Debt Obligations

The face value of our total long-term debt obligations is as follows (in millions):



	December 31, 2018			March 31, 2019
2.600% Notes due on December 5, 2019 (2)	1,000			1,000
1.900% Notes due on August 21, 2020 (3)	1,000			1,000
3.300% Notes due on December 5, 2021 (2)	1,000			1,000
2.500% Notes due on November 29, 2022 (1)	1,250			1,250
2.400% Notes due on February 22, 2023 (3)	1,000			1,000
2.800% Notes due on August 22, 2024 (3)	2,000			2,000
3.800% Notes due on December 5, 2024 (2)	1,250			1,250
5.200% Notes due on December 3, 2025 (4)	1,000			1,000
3.150% Notes due on August 22, 2027 (3)	3,500			3,500
4.800% Notes due on December 5, 2034 (2)	1,250			1,250
3.875% Notes due on August 22, 2037 (3)	2,750			2,750
4.950% Notes due on December 5, 2044 (2)	1,500			1,500
4.050% Notes due on August 22, 2047 (3)	3,500			3,500
4.250% Notes due on August 22, 2057 (3)	2,250			2,250
Credit Facility	594			539
Other long-term debt	121			242
Total debt	24,965			25,031
Less current portion of long-term debt	(1,371		)	(1,608		)
Face value of long-term debt	$	23,594		$	23,423

_____________________________


(1)	Issued in November 2012, effective interest rate of the 2022 Notes was 2.66%.


(2)	Issued in December 2014, effective interest rates of the 2019, 2021, 2024, 2034, and 2044 Notes were 2.73%, 3.43%, 3.90%, 4.92%, and 5.11%.


(3)	Issued in August 2017, effective interest rates of the 2020, 2023, 2024, 2027, 2037, 2047, and 2057 Notes were 2.16%, 2.56%, 2.95%, 3.25%, 3.94%, 4.13%, and 4.33%.


(4)	Consists of $872 million of 2025 Notes issued in December 2017 in exchange for notes assumed in connection with the acquisition of Whole Foods Market and $128 million of 2025 Notes issued by Whole Foods Market that did not participate in our December 2017 exchange offer. The effective interest rate of the 2025 Notes was 3.02%.

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 505
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-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Stock-Based Compensation Expense

Stock-based compensation expense is as follows (in millions):



	Three Months Ended March 31,
	2018		2019
Cost of sales	$	15	$	24
Fulfillment	244		234
Marketing	161		209
Technology and content	631		675
General and administrative	132		132
Total stock-based compensation expense	$	1,183	$	1,274

Nonvested Restricted Stock Units Activity

The following table summarizes our restricted stock unit activity for the three months ended March 31, 2019 (in millions):



	Number of Units		Weighted-Average Grant-Date Fair Value
Outstanding as of December 31, 2018	15.9		$	1,024
Units granted	0.6		1,677
Units vested	(1.2	)	627
Units forfeited	(0.4	)	1,023
Outstanding as of March 31, 2019	14.9		$	1,080

Scheduled Vesting Restricted Stock Unit Activity

Scheduled vesting for outstanding restricted stock units as of March 31, 2019, is as follows (in millions):



	Nine Months Ended December 31,	Year Ended December 31,
	2019	2020	2021	2022	2023	Thereafter	Total
Scheduled vesting—restricted stock units	5.6	5.5	2.5	1.0	0.2	0.1	14.9

Changes in Stockholders Equity

The following table shows the changes in stockholders’ equity (in millions):



	Three Months Ended March 31,
	2018			2019
Total beginning stockholders' equity	$	27,709		$	43,549

Beginning and ending common stock	5			5

Beginning and ending treasury stock	(1,837		)	(1,837		)

Beginning additional paid-in capital	21,389			26,791
Stock-based compensation and issuance of employee benefit plan stock	1,174			1,268
Ending additional paid-in capital	22,563			28,059

Beginning accumulated other comprehensive loss	(484		)	(1,035		)
Other comprehensive income (loss)	17			25
Ending accumulated other comprehensive loss	(467		)	(1,010		)

Beginning retained earnings	8,636			19,625
Cumulative effect of changes in accounting principles (1)	934			7
Net income	1,629			3,561
Ending retained earnings	11,199			23,193

Total ending stockholders’ equity	$	31,463		$	48,410

___________________


(1)	We recorded cumulative effect adjustments related to the new revenue and income tax standards in Q1 2018 and the new lease standard in Q1 2019. See Item 1 of Part I, “Financial Statements — Note 1 — Accounting Policies — Accounting Pronouncements Recently Adopted” for additional information.

Segment Information (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Information on Reportable Segments and Reconciliation to Consolidated Net Income

Information on reportable segments and reconciliation to consolidated net income is as follows (in millions):



	Three Months Ended March 31,
	2018			2019
North America
Net sales	$	30,725		$	35,812
Operating expenses	29,576			33,525
Operating income	$	1,149		$	2,287

International
Net sales	$	14,875		$	16,192
Operating expenses	15,497			16,282
Operating income (loss)	$	(622	)	$	(90	)

AWS
Net sales	$	5,442		$	7,696
Operating expenses	4,042			5,473
Operating income	$	1,400		$	2,223

Consolidated
Net sales	$	51,042		$	59,700
Operating expenses	49,115			55,280
Operating income	1,927			4,420
Total non-operating income (expense)	(11		)	(19		)
Provision for income taxes	(287		)	(836		)
Equity-method investment activity, net of tax	—			(4		)
Net income	$	1,629		$	3,561

Disaggregation of Revenue

Net sales by groups of similar products and services, which also have similar economic characteristics, is as follows (in millions):



	Three Months Ended March 31,
	2018		2019
Net Sales:
Online stores (1)	$	26,939	$	29,498
Physical stores (2)	4,263		4,307
Third-party seller services (3)	9,265		11,141
Subscription services (4)	3,102		4,342
AWS	5,442		7,696
Other (5)	2,031		2,716
Consolidated	$	51,042	$	59,700

____________________________

(1)

Includes product sales and digital media content where we record revenue gross. We leverage our retail infrastructure to offer a wide selection of consumable and durable goods that includes media products available in both a physical and digital format, such as books, music, videos, games, and software. These product sales include digital products sold on a transactional basis. Digital product subscriptions that provide unlimited viewing or usage rights are included in Subscription services.


(2)	Includes product sales where our customers physically select items in a store.


(3)	Includes commissions and any related fulfillment and shipping fees, and other third-party seller services.


(4)	Includes annual and monthly fees associated with Amazon Prime memberships, as well as audiobook, digital video, e-book, digital music, and other non-AWS subscription services.


(5)	Primarily includes sales of advertising services, as well as sales related to our other service offerings.

Accounting Policies - Calculation of Diluted Shares (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accounting Policies [Abstract]
Shares used in computation of basic earnings per share	491	484
Total dilutive effect of outstanding stock awards	11	14
Shares used in computation of diluted earnings per share	502	498

Accounting Policies - Accounts Receivable, Net and Other (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net and other	$ 15,979	$ 16,677
Customer Receivables, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net and other	9,800	9,400
Vendor Receivables, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net and other	2,500	3,200
Seller Receivables, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net and other	$ 660	$ 710

Accounting Policies - Leases (Details)	3 Months Ended
Accounting Policies - Leases (Details)	Mar. 31, 2019
Minimum \| Equipment
Lessee, Lease, Description [Line Items]
Lessee, Operating and Finance Lease, Term of Contract	2 years
Minimum \| Property
Lessee, Lease, Description [Line Items]
Lessee, Operating and Finance Lease, Term of Contract	2 years
Maximum \| Equipment
Lessee, Lease, Description [Line Items]
Lessee, Operating and Finance Lease, Term of Contract	10 years
Maximum \| Property
Lessee, Lease, Description [Line Items]
Lessee, Operating and Finance Lease, Term of Contract	20 years

Accounting Policies - Video and Music Content (Details) - USD ($) $ in Billions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Accounting Policies [Abstract]
Weighted Average Life, Capitalized Video Content	2 years 7 months
Video and Music Content, Capitalized Costs	$ 4.2		$ 3.8
Video and Music Content, Expense	$ 1.7	$ 1.5

Accounting Policies - Unearned Revenue (Details) - USD ($) $ in Billions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Unearned revenue		$ 7.9
Unearned revenue, revenue recognized from beginning balance	$ 2.8
Unearned Revenue, Noncurrent	1.4	$ 1.4
Remaining performance obligation, contracts exceeding one year	$ 21.6
Remaining performance obligation, expected timing of satisfaction, weighted average remaining life	3 years 4 months

Accounting Policies - Accounting Pronouncements Recently Adopted (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Leases, Asset	$ 20,132		$ 0
Operating Lease, Liability	20,881
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Leases, Asset		$ 21,000
Operating Lease, Liability		(21,000)
Financing Obligations Reclassified to Operating Leases		$ 1,200	1,500
Financing Obligations and Construction Liabilities			9,600
Build-to-suit liabilities derecognized			1,500
Financing Obligations Reclassified to Finance Leases			$ 5,400
Accounting Standards Update 2019-02 [Domain]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Incremental Capitalized Film Costs	$ 130

Financial Instruments - Fair Values on Recurring Basis (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Schedule of Investments [Line Items]
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ 68
Recurring
Schedule of Investments [Line Items]
Cash	8,635	$ 10,406
Total Estimated Fair Value
Cash, cash equivalents and marketable securities	37,414	41,676
Less: Restricted cash, cash equivalents, and marketable securities	(394)	(426)
Total cash, cash equivalents, and marketable securities	37,020	41,250
Cost or Amortized Cost
Cash, cash equivalents and marketable securities	37,159
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax
Debt Securities, Available for Sale, Unrealized Gain	14
Debt Securities, Available for Sale, Unrealized Loss	(22)
Recurring \| Level 1 securities
Total Estimated Fair Value
Equity Securities, FV-NI	263	170
Recurring \| Level 1 securities \| Money market funds
Schedule of Investments [Line Items]
Money market funds	9,515	12,515
Recurring \| Level 2 securities
Total Estimated Fair Value
Equity Securities, FV-NI	0	33
Recurring \| Level 2 securities \| Foreign government and agency securities
Total Estimated Fair Value
Debt Securities, Available for Sale, Fair Value	1,382	815
Cost or Amortized Cost
Debt Securities, Available for Sale, Cost	1,382
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax
Debt Securities, Available for Sale, Unrealized Gain	0
Debt Securities, Available for Sale, Unrealized Loss	0
Recurring \| Level 2 securities \| U.S. government and agency securities
Total Estimated Fair Value
Debt Securities, Available for Sale, Fair Value	8,854	11,667
Cost or Amortized Cost
Debt Securities, Available for Sale, Cost	8,864
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax
Debt Securities, Available for Sale, Unrealized Gain	3
Debt Securities, Available for Sale, Unrealized Loss	(13)
Recurring \| Level 2 securities \| Corporate debt securities
Total Estimated Fair Value
Debt Securities, Available for Sale, Fair Value	7,398	4,990
Cost or Amortized Cost
Debt Securities, Available for Sale, Cost	7,396
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax
Debt Securities, Available for Sale, Unrealized Gain	8
Debt Securities, Available for Sale, Unrealized Loss	(6)
Recurring \| Level 2 securities \| Asset-backed securities
Total Estimated Fair Value
Debt Securities, Available for Sale, Fair Value	1,167	892
Cost or Amortized Cost
Debt Securities, Available for Sale, Cost	1,166
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax
Debt Securities, Available for Sale, Unrealized Gain	3
Debt Securities, Available for Sale, Unrealized Loss	(2)
Recurring \| Level 2 securities \| Other fixed income securities
Total Estimated Fair Value
Debt Securities, Available for Sale, Fair Value	200	$ 188
Cost or Amortized Cost
Debt Securities, Available for Sale, Cost	201
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax
Debt Securities, Available for Sale, Unrealized Gain	0
Debt Securities, Available for Sale, Unrealized Loss	$ (1)

Financial Instruments - Contractual Maturities (Details) $ in Millions	Mar. 31, 2019 USD ($)
Amortized Cost
Due within one year	$ 23,482
Due after one year through five years	4,274
Due after five years through ten years	190
Due after ten years	578
Cash Equivalents and Marketable Fixed Income Securities, Cost	28,524
Estimated Fair Value
Due within one year	23,478
Due after one year through five years	4,277
Due after five years through ten years	190
Due after ten years	571
Cash Equivalents and Marketable Fixed Income Securities, Fair Value	$ 28,516

Financial Instruments - Equity Warrant Assets and Non-Marketable Equity Securities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Investments, Warrant Assets and Non-Marketable Equity Securities
Equity Securities without Readily Determinable Fair Value, Amount	$ 888		$ 282
Warrant
Investments, Warrant Assets and Non-Marketable Equity Securities
Gain (loss) on warrant assets	89	$ 45
Warrant \| Level 2 assets
Investments, Warrant Assets and Non-Marketable Equity Securities
Fair value of warrant assets	$ 594		$ 440

Financial Instruments - Reconciliation to Cash Flow (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Cash and cash equivalents	$ 23,115	$ 31,750
Restricted cash included in accounts receivable, net and other	359	418
Restricted cash included in other assets	33	5
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$ 23,507	$ 32,173	$ 17,616	$ 21,856	$ 16,301

Leases - Additional Information (Details) - USD ($) $ in Billions	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Finance Lease, Right-of-Use Asset	$ 46.5	$ 36.1
Finance Lease, Right-of-Use-Asset, Accumulated Amortization	$ 23.0	$ 19.8

Leases - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended
Leases - Lease Cost (Details) - USD ($) $ in Millions	Mar. 31, 2019	Mar. 31, 2018
Leases [Abstract]
Operating lease cost	$ 836
Finance lease amortization of lease assets	2,307
Finance lease interest on lease liabilities	156
Finance lease cost	2,463
Variable lease cost	250
Total lease cost	$ 3,549
Rental expense under operating lease agreements		$ 791

Leases - Other Operating and Finance Lease Information (Details)	Mar. 31, 2019
Leases [Abstract]
Weighted-average remaining lease term – operating leases	11 years 5 months
Weighted-average remaining lease term – finance leases	5 years 8 months
Weighted-average discount rate – operating leases	3.20%
Weighted-average discount rate – finance leases	2.90%

Leases - Operating and Finance Lease Liability Reconciliation (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Gross lease liabilities - operating leases	$ 26,731
Gross lease liabilities - finance leases	25,004
Gross lease liabilities	51,735
Imputed interest - operating leases	(5,850)
Imputed interest - finance leases	(1,810)
Imputed interest	(7,660)
Present value of operating leases	20,881
Present value of finance leases	23,194
Present value of lease liabilities	44,075
Current portion of operating lease liabilities	(2,490)
Current portion of finance lease liabilities	(8,310)
Current portion of lease liabilities	(10,800)
Total long-term operating lease liabilities	18,391
Total long-term finance lease liabilities	14,884
Total long-term lease liabilities	$ 33,275	$ 9,650

Commitments and Contingencies - Principal Contractual Commitments Excluding Open Orders (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Debt principal and interest
Nine Months Ended December 31, 2019	$ 1,992
Year Ended December 31, 2020	2,161
Year Ended December 31, 2021	1,874
Year Ended December 31, 2022	2,090
Year Ended December 31, 2023	1,794
Thereafter	30,014
Total	39,925
Operating leases
Nine Months Ended December 31, 2019	2,355
Year Ended December 31, 2020	3,077
Year Ended December 31, 2021	2,794
Year Ended December 31, 2022	2,473
Year Ended December 31, 2023	2,214
Thereafter	13,818
Gross lease liabilities - operating leases	26,731
Finance lease liabilities, including interest
Nine Months Ended December 31, 2019	6,247
Year Ended December 31, 2020	7,268
Year Ended December 31, 2021	4,218
Year Ended December 31, 2022	1,444
Year Ended December 31, 2023	1,022
Thereafter	4,805
Gross lease liabilities - finance leases	25,004
Financing obligations, including interest
Nine Months Ended December 31, 2019	15
Year Ended December 31, 2020	23
Year Ended December 31, 2021	23
Year Ended December 31, 2022	24
Year Ended December 31, 2023	24
Thereafter	313
Total	422
Unconditional purchase obligations
Nine Months Ended December 31, 2019	2,272
Year Ended December 31, 2020	3,845
Year Ended December 31, 2021	3,314
Year Ended December 31, 2022	3,057
Year Ended December 31, 2023	2,931
Thereafter	5,148
Total	20,567
Other commitments
Nine Months Ended December 31, 2019	2,409
Year Ended December 31, 2020	2,154
Year Ended December 31, 2021	1,450
Year Ended December 31, 2022	1,188
Year Ended December 31, 2023	1,015
Thereafter	10,451
Total	18,667
Accrued tax contingencies	3,600	$ 3,400
Total commitments
Nine Months Ended December 31, 2019	15,290
Year Ended December 31, 2020	18,528
Year Ended December 31, 2021	13,673
Year Ended December 31, 2022	10,276
Year Ended December 31, 2023	9,000
Thereafter	64,549
Total	$ 131,316

Commitments and Contingencies - Pledged Assets (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Pledged assets	$ 609	$ 575

Debt - Additional Information (Details)	1 Months Ended
Debt - Additional Information (Details)	Apr. 30, 2018 USD ($) extension	Oct. 31, 2016 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Borrowings outstanding			$ 25,031,000,000	$ 24,965,000,000
Face value of long-term debt			23,423,000,000	23,594,000,000
Commercial Paper
Debt Instrument [Line Items]
Credit term	397 days
Commercial Paper			0	0
Commercial Paper, Maximum Borrowing Capacity	$ 7,000,000,000
Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount (Premium), Net			101,000,000	101,000,000
Borrowings outstanding			24,300,000,000
Estimated fair value of notes			25,500,000,000	24,300,000,000
Senior Notes \| 5.200% Notes due on December 3, 2025
Debt Instrument [Line Items]
Borrowings outstanding			1,000,000,000	1,000,000,000
Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Borrowings outstanding			539,000,000	594,000,000
Credit Facility \| Revolving Credit Facility \| October 2016 Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit maximum borrowing capacity		$ 500,000,000	620,000,000
Credit term		3 years
Commitment fee percentage		0.50%
Borrowings outstanding			$ 539,000,000	$ 594,000,000
Weighted average interest rate			3.30%	3.20%
Collateral amount			$ 630,000,000	$ 686,000,000
Credit Facility \| Revolving Credit Facility \| October 2016 Revolving Credit Facility \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		1.65%
Credit Facility \| Revolving Credit Facility \| April 2018 Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit maximum borrowing capacity	$ 7,000,000,000
Credit term	3 years
Line Of Credit Facility, Number Of Extensions \| extension	3
Line Of Credit Facility, Additional Term	1 year
Commitment fee percentage	0.04%
Borrowings outstanding			0	0
Credit Facility \| Revolving Credit Facility \| April 2018 Revolving Credit Facility \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	0.50%
Amazon.com, Inc. \| 5.200% Notes due on December 3, 2025
Debt Instrument [Line Items]
Borrowings outstanding			872,000,000
Whole Foods Market, Inc. \| 5.200% Notes due on December 3, 2025
Debt Instrument [Line Items]
Borrowings outstanding			128,000,000
Line of Credit and Other Long-term Debt
Debt Instrument [Line Items]
Borrowings outstanding			781,000,000	715,000,000
Other Long-term Debt
Debt Instrument [Line Items]
Borrowings outstanding			$ 242,000,000	$ 121,000,000
Weighted average interest rate			5.50%	6.00%

Debt - Long-Term Debt Obligations (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018	Apr. 30, 2018	Oct. 31, 2016
Debt Instrument [Line Items]
Total debt	$ 25,031,000,000	$ 24,965,000,000
Less current portion of long-term debt	(1,608,000,000)	(1,371,000,000)
Face value of long-term debt	23,423,000,000	23,594,000,000
Senior Notes
Debt Instrument [Line Items]
Total debt	$ 24,300,000,000
Senior Notes \| 2.600% Notes due on December 5, 2019
Debt Instrument [Line Items]
Stated interest rate	2.60%
Total debt	$ 1,000,000,000	1,000,000,000
Effective interest rates	2.73%
Senior Notes \| 1.900% Notes due on August 21, 2020
Debt Instrument [Line Items]
Stated interest rate	1.90%
Total debt	$ 1,000,000,000	1,000,000,000
Effective interest rates	2.16%
Senior Notes \| 3.300% Notes due on December 5, 2021
Debt Instrument [Line Items]
Stated interest rate	3.30%
Total debt	$ 1,000,000,000	1,000,000,000
Effective interest rates	3.43%
Senior Notes \| 2.500% Notes due on November 29, 2022
Debt Instrument [Line Items]
Stated interest rate	2.50%
Total debt	$ 1,250,000,000	1,250,000,000
Effective interest rates	2.66%
Senior Notes \| 2.400% Notes due on February 22, 2023
Debt Instrument [Line Items]
Stated interest rate	2.40%
Total debt	$ 1,000,000,000	1,000,000,000
Effective interest rates	2.56%
Senior Notes \| 2.800% Notes due on August 22, 2024
Debt Instrument [Line Items]
Stated interest rate	2.80%
Total debt	$ 2,000,000,000	2,000,000,000
Effective interest rates	2.95%
Senior Notes \| 3.800% Notes due on December 5, 2024
Debt Instrument [Line Items]
Stated interest rate	3.80%
Total debt	$ 1,250,000,000	1,250,000,000
Effective interest rates	3.90%
Senior Notes \| 5.200% Notes due on December 3, 2025
Debt Instrument [Line Items]
Stated interest rate	5.20%
Total debt	$ 1,000,000,000	1,000,000,000
Effective interest rates	3.02%
Senior Notes \| 3.150% Notes due on August 22, 2027
Debt Instrument [Line Items]
Stated interest rate	3.15%
Total debt	$ 3,500,000,000	3,500,000,000
Effective interest rates	3.25%
Senior Notes \| 4.800% Notes due on December 5, 2034
Debt Instrument [Line Items]
Stated interest rate	4.80%
Total debt	$ 1,250,000,000	1,250,000,000
Effective interest rates	4.92%
Senior Notes \| 3.875% Notes due on August 22, 2037
Debt Instrument [Line Items]
Stated interest rate	3.875%
Total debt	$ 2,750,000,000	2,750,000,000
Effective interest rates	3.94%
Senior Notes \| 4.950% Notes due on December 5, 2044
Debt Instrument [Line Items]
Stated interest rate	4.95%
Total debt	$ 1,500,000,000	1,500,000,000
Effective interest rates	5.11%
Senior Notes \| 4.050% Notes due on August 22, 2047
Debt Instrument [Line Items]
Stated interest rate	4.05%
Total debt	$ 3,500,000,000	3,500,000,000
Effective interest rates	4.13%
Senior Notes \| 4.250% Notes due on August 22, 2057
Debt Instrument [Line Items]
Stated interest rate	4.25%
Total debt	$ 2,250,000,000	2,250,000,000
Effective interest rates	4.33%
Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Total debt	$ 539,000,000	594,000,000
Credit Facility \| October 2016 Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit maximum borrowing capacity	620,000,000			$ 500,000,000
Credit Facility \| April 2018 Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit maximum borrowing capacity			$ 7,000,000,000
Other long-term debt
Debt Instrument [Line Items]
Total debt	$ 242,000,000	$ 121,000,000

Stockholders' Equity - Additional Information (Details) - USD ($) shares in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Feb. 29, 2016
Class of Stock [Line Items]
Common shares outstanding plus underlying outstanding stock awards	507		507
Net unrecognized compensation cost related to unvested stock-based compensation arrangements	$ 6,100,000,000
Compensation cost expected to be expensed in next twelve months, percentage	50.00%
Net unrecognized compensation cost related to unvested stock-based compensation arrangements, weighted average recognition period (in years)	1 year 1 month
Estimated forfeiture rate	27.00%		27.00%
February 2016 Program
Class of Stock [Line Items]
Stock repurchase, authorized amount				$ 5,000,000,000
Stock Repurchased During Period, Value	$ 0	$ 0

Stockholders' Equity - Stock-based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 1,274	$ 1,183
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	24	15
Fulfillment
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	234	244
Marketing
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	209	161
Technology and content
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	675	631
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 132	$ 132

Stockholders' Equity - Restricted Stock Unit Activity (Details) - Restricted Stock Units shares in Millions	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Number of Units
Beginning balance (in shares) \| shares	15.9
Units granted (in shares) \| shares	0.6
Units vested (in shares) \| shares	(1.2)
Units forfeited (in shares) \| shares	(0.4)
Ending balance (in shares) \| shares	14.9
Weighted-Average Grant-Date Fair Value
Outstanding as of December 31, 2018 \| $ / shares	$ 1,024
Units granted \| $ / shares	1,677
Units vested \| $ / shares	627
Units forfeited \| $ / shares	1,023
Outstanding as of March 31, 2019 \| $ / shares	$ 1,080

Stockholders' Equity - Scheduled Vesting for Outstanding Restricted Stock Units (Details) - Restricted Stock Units - shares shares in Millions	Mar. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nine Months Ended December 31, 2019	5.6
Year Ended December 31, 2020	5.5
Year Ended December 31, 2021	2.5
Year Ended December 31, 2022	1.0
Year Ended December 31, 2023	0.2
Thereafter	0.1
Total	14.9	15.9

Stockholders' Equity - Changes in Stockholders Equity (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Stockholders' equity	$ 48,410	$ 31,463	$ 48,410	$ 31,463		$ 43,549		$ 27,709
Other comprehensive income (loss)	25	17
Net Income	3,561	1,629	12,005	3,938
Common stock
Stockholders' equity	5	5	5	5		5		5
Treasury stock
Stockholders' equity	(1,837)	(1,837)	(1,837)	(1,837)		(1,837)		(1,837)
Additional paid-in capital
Stockholders' equity	28,059	22,563	28,059	22,563		26,791		21,389
Stock-based compensation and issuance of employee benefit plan stock	1,268	1,174
Accumulated other comprehensive income (loss)
Stockholders' equity	(1,010)	(467)	(1,010)	(467)		(1,035)		(484)
Other comprehensive income (loss)	25	17
Retained earnings
Stockholders' equity	23,193	11,199	$ 23,193	$ 11,199		$ 19,625		$ 8,636
Cumulative effect of changes in accounting principles					$ 7		$ 934
Net Income	$ 3,561	$ 1,629

Income Taxes - Income Taxes (Details) € in Millions, $ in Millions		3 Months Ended		12 Months Ended
	Oct. 04, 2017 EUR (€)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Income Tax Disclosure [Abstract]
Provision for income taxes		$ 836	$ 287
Discrete tax benefits		261	368
Cash taxes paid, net of refunds		168	$ 513	$ 840	$ 1,224
Tax contingencies		3,600		$ 3,600		$ 3,400
Internal Revenue Service (IRS) \| Domestic Tax Authority [Member]
Income Tax Examination [Line Items]
Tax examination, estimate of additional tax expense		$ 1,500
Luxembourg Tax Administration [Member] \| Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Tax examination, estimate of additional tax expense \| €	€ 250

Segment Information - Reportable Segments and Reconciliation to Consolidated Net Income (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)
Segment Reporting [Abstract]
Number of operating segments \| segment	3
Segment Reporting Disclosure [Line Items]
Net sales	$ 59,700	$ 51,042
Operating expenses	55,280	49,115
Operating income (loss)	4,420	1,927
Total non-operating income (expense)	(19)	(11)
Provision for income taxes	(836)	(287)
Equity-method investment activity, net of tax	(4)	0
Net income	3,561	1,629	$ 12,005	$ 3,938
North America
Segment Reporting Disclosure [Line Items]
Net sales	35,812	30,725
Operating expenses	33,525	29,576
Operating income (loss)	2,287	1,149
International
Segment Reporting Disclosure [Line Items]
Net sales	16,192	14,875
Operating expenses	16,282	15,497
Operating income (loss)	(90)	(622)
AWS
Segment Reporting Disclosure [Line Items]
Net sales	7,696	5,442
Operating expenses	5,473	4,042
Operating income (loss)	$ 2,223	$ 1,400

Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Total net sales	$ 59,700	$ 51,042
Online stores
Disaggregation of Revenue [Line Items]
Total net sales	29,498	26,939
Physical stores
Disaggregation of Revenue [Line Items]
Total net sales	4,307	4,263
Third-party seller services
Disaggregation of Revenue [Line Items]
Total net sales	11,141	9,265
Subscription services
Disaggregation of Revenue [Line Items]
Total net sales	4,342	3,102
AWS
Disaggregation of Revenue [Line Items]
Total net sales	7,696	5,442
Other
Disaggregation of Revenue [Line Items]
Total net sales	$ 2,716	$ 2,031