Stockholders' Equity (Deficit) - Restricted Stock Units (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 69.0	$ 113.0	$ 56.0
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	56.0	75.0	26.0
Unrecognized stock-based compensation expense relating to unvested awards that will be amortized	$ 48.0
Weighted-average period of amortization	2 years
Fair value at vesting date	$ 118.0	$ 88.0	$ 17.0
Number of Restricted Stock Units (in shares) [Roll Forward]
Unvested units outstanding at the beginning of the period (in shares)	2.7
Number of RSUs granted (in shares)	1.8
Number of RSUs vested (in shares)	(2.0)
Number of RSUs cancelled (in shares)	(0.8)
Unvested units outstanding at the end of the period (in shares)	1.7	2.7
Weighted Average Grant Date Fair Value (in dollars per share) [Roll Forward]
Weighted average grant date fair value of unvested units outstanding at the beginning of the period (in usd per share)	$ 32.03
Fair value of RSUs granted (in usd per share)	56.88	$ 55.64
Fair value of RSUs vested (in usd per share)	38.91
Fair value of RSUs cancelled (in usd per share)	38.23
Weighted average grant date fair value of unvested units outstanding at the end of the period (in usd per share)	$ 46.66	32.03
Equity Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense relating to unvested awards that will be amortized	$ 1.0
Weighted-average period of amortization	2 years
Weighted Average Grant Date Fair Value (in dollars per share) [Roll Forward]
Fair value of RSUs granted (in usd per share)	$ 57.67	$ 74.16	$ 35.41

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

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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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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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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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