Common Stock, Increase In Capital Shares Reserved For Future Issuance

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Employee Stock Purchase Plan, Common Stock Available Increase Calculation, Percent Of Total Shares Outstanding

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Employee Stock Purchase Plan, Common Stock Available Increase Calculation, Upper Threshold, Shares

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Equity Incentive Plan, Available Award Increases, Term

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Equity Incentive Plan, Increase Calculation, Percent Of Increase

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Equity Method Investment, Equity Interest Purchased, Shares

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Equity Method Investment, Equity Interest Purchases, Price Per Share

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Investment Purchase Agreement, Preferred Stock Issued, Price

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Preferred Stock, Shares Purchased

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Proceeds From Issuance Of Common Stock, Employee Stock Purchase Plan

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Share-Based Compensation Arrangement By Share-Based Payment Award, Options And Non-Option Equity Instruments, Exercised During Period, Intrinsic Value

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Share-Based Payment Arrangement, Shares Withheld For Tax Withholding Obligation, Value

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Share-based Compensation Arrangement by Share-based Payment Award, Weighted Average Derived Service Period

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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Aggregate number of common shares reserved for future issuance.

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Aggregate dividends declared during the period for each share of common stock outstanding.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Amount of cost capitalized for award under share-based payment arrangement.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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Cash received on stock transaction after deduction of issuance costs.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Per share weighted-average price paid for shares purchased on open market for issuance under share-based payment arrangement.

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An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.

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The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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Redeemable Convertible Preferred Stock, Common Stock, and Equity (Deficit) - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions				1 Months Ended			12 Months Ended
	Jan. 01, 2020	May 16, 2019	May 14, 2019	Jan. 31, 2019	Jan. 31, 2018	Nov. 30, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	May 31, 2019	Apr. 30, 2019	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares issued (in shares)							0			903,607,000
Preferred stock, shares outstanding (in shares)							0			903,607,000
Common stock shares issued (in shares)							1,716,681,000	457,189,000
Common stock shares outstanding (in shares)							1,716,681,000	457,189,000
Preferred stock, shares authorized (in shares)							10,000,000			946,246,000
Common stock shares authorized (in shares)							5,000,000,000	2,696,114,000
Common stock par value (in dollars per share)							$ 0.00001	$ 0.00001
Common Stock, Dividends, Per Share, Declared							$ 0
Intrinsic value of options exercised during period							$ 202	$ 392	$ 112
Incremental stock-based compensation costs relating to modification of awards								56	69
Proceeds from the issuance of common stock under the Employee Stock Purchase Plan							$ 49	$ 0	$ 0
Weighted average grant date fair value of options granted (in dollars per share)							$ 19.91	$ 12.94	$ 18.65
Share-based compensation expense							$ 4,596	$ 172	$ 137
Restricted Stock Awards, Restricted Stock Units, and Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized compensation costs							$ 2,100
Weighted-average recognition period							2 years 5 months 12 days
Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of instruments vested during period								$ 4	$ 91
Weighted-average grant-date fair value per share, granted (in dollars per share)								$ 47.20	$ 43.14
Awards granted (in shares)							0
SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value per share, granted (in dollars per share)							$ 19.91	$ 12.94	$ 18.65
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of instruments vested during period							$ 1,400	$ 967	$ 486
Weighted-average grant-date fair value per share, granted (in dollars per share)							$ 41.55
Awards granted (in shares)							62,830,000
Performance-Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value per share, granted (in dollars per share)							$ 18.20	$ 14.77	$ 18.96
Weighted-average derived service period							2 years 1 month 13 days	3 years 3 months 21 days	3 years 4 months 6 days
2013 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in stock reserved for issuance (in shares)				85,000,000
Number of shares reserved for future issuance (in shares)				293,000,000
2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for future issuance (in shares)											130,000,000
Equity incentive plan, term over which available awards may increase							10 years
Equity incentive plan, percent of increase							5.00%
Employee Stock Purchase Plan, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for future issuance (in shares)							23,000,000					25,000,000
Unamortized compensation costs							$ 43
Weighted-average recognition period							9 months 18 days
ESPP, percent of total shares outstanding, increase calculation							1.00%
ESPP, upper threshold on increase in authorized shares (in shares)							25,000,000
Issuance of common stock under the Employee Stock Purchase Plan (in shares)							2,000,000
Weighted average price per share of stock (in dollars per share)							$ 23.83
Proceeds from the issuance of common stock under the Employee Stock Purchase Plan							$ 49
Series E Redeemable Convertible Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of securities called by warrants (in shares)								150,071
Series G Redeemable Convertible Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of securities called by warrants (in shares)								922,655
Redeemable convertible preferred stock \| Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)							0
Subsequent Event \| 2019 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in stock reserved for issuance (in shares)	86,000,000
IPO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period (in shares)			180,000,000
Stock price (in dollars per share)		$ 45.00	$ 45.00
Proceeds from issuance of common stock			$ 8,000
Conversion of shares (in shares)			905,000,000
Shares withheld to meet tax withholding requirements (in shares)			29,000,000
Shares withheld to meet tax withholding requirement, value			$ 1,300
Share-based compensation expense			$ 3,600
IPO \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period (in shares)			76,000,000
Private Placement
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period (in shares)		11,000,000
Proceeds from issuance of common stock		$ 500
Softbank
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Direct investment					$ 1,300
Price per share of preferred stock issued (in dollars per share)						$ 48.77
Preferred Stock, Shares Purchased					25,600,000
Equity ownership interest					20.00%
Softbank \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares purchased from existing stockholder (in dollars per share)						$ 32.97
Shares purchased from existing stockholders					242,800,000
Minimum \| Softbank
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Direct investment						$ 1,000
Maximum \| Softbank
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Direct investment						$ 1,300
Internal-use software
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Capitalized share based payment							$ 61