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

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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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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 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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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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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	3 Months Ended		9 Months Ended
	May 16, 2019	May 14, 2019	Jan. 31, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Apr. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares authorized (in shares)				10,000,000		10,000,000
Preferred stock, shares issued (in shares)				0		0
Preferred stock, shares outstanding (in shares)				0		0
Incremental stock-based compensation costs relating to modification of awards							$ 52
Share-based compensation expense				$ 401	$ 64	$ 4,353	$ 147
Restricted Stock Awards, Restricted Stock Units, and Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized compensation costs				$ 2,400		$ 2,400
Weighted-average recognition period						2 years 4 months 24 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%
ESPP 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for future issuance (in shares)				25,000,000		25,000,000
ESPP, percent of total shares outstanding, increase calculation										1.00%
ESPP, upper threshold on increase in authorized shares (in shares)								25,000,000
IPO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion of shares (in shares)		905,000,000
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
Share-based compensation expense		$ 3,600
Shares withheld to meet tax withholding requirements (in shares)		29,000,000
Shares withheld to meet tax withholding requirement, value		$ 1,300
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
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
Common Stock \| IPO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period (in shares)		76,000,000