Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements (“condensed consolidated financial statements”) have been prepared in conformity with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and the applicable rules and regulations of the Securities and Exchange Commission (the “SEC”) regarding interim financial information. Certain information and note disclosures normally included in the consolidated financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. As such, the information included in this Quarterly Report on Form 10-Q should be read in conjunction with the audited consolidated financial statements and the related notes thereto as of and for the year ended December 31, 2021, included in our Annual Report on Form 10-K, filed with the SEC on February 25, 2022. There have been no changes to the Company’s significant accounting policies described in the Annual Report on Form 10-K for the year ended December 31, 2021 that have had a material impact on our condensed consolidated financial statements and related notes. The results for the interim periods are not necessarily indicative of results for the full year. The accompanying condensed consolidated financial statements include accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. In the opinion of management, these condensed consolidated financial statements reflect all adjustments, consisting only of normal recurring adjustments, which are necessary for the fair statement of the condensed consolidated financial position, results of operations and cash flows for these interim periods.
Principles of Consolidation	Principles of Consolidation The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries and variable interest entities (“VIE”) in which the Company is the primary beneficiary in accordance with consolidation accounting guidance. All intercompany transactions have been eliminated in consolidation. The Company determines, at the inception of each arrangement, whether an entity in which it has made an investment or in which it has other variable interest in is considered a VIE. The Company consolidates a VIE when it is deemed to be the primary beneficiary. The primary beneficiary of a VIE is the party that meets both of the following criteria: (i) has the power to direct the activities that most significantly affect the economic performance of the VIE; and (ii) has the obligation to absorb losses or the right to receive benefits that in either case could potentially be significant to the VIE. Periodically, the Company determines whether any changes in its interest or relationship with the entity impact the determination of whether the entity is still a VIE and, if so, whether the Company is the primary beneficiary. If the Company is not deemed to be the primary beneficiary in a VIE, the Company accounts for the investment or other variable interest in a VIE in accordance with applicable U.S. GAAP. As of March 31, 2022, the Company’s consolidated VIEs were not material to the condensed consolidated financial statements.
Use of Estimates	Use of Estimates The preparation of the Company’s condensed consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. The Company regularly evaluates its estimates, including those related to bad debt reserves, fair value of investments, useful lives of long-lived assets and intangible assets, valuation of acquired goodwill and intangible assets from acquisitions, contingent liabilities, insurance reserves, revenue recognition, valuation of common stock, stock-based compensation, and income and non-income taxes, among others. Actual results could differ materially from these estimates. As the impact of the COVID-19 pandemic continues to evolve, estimates and assumptions about future events and their effects cannot be determined with certainty and therefore require increased judgment. These estimates and assumptions may change in future periods and will be recognized in the consolidated financial statements as new events occur and additional information becomes known. To the extent the Company’s actual results differ materially from those estimates and assumptions, the Company’s future consolidated financial statements could be affected.
Recently Adopted Accounting Standards and Recently Issued Accounting Standards Not Yet Adopted	Recently Adopted Accounting Standards In May 2021, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2021-04 Earnings Per Share (Topic 260), Debt - Modifications and Extinguishments (Topic 470-50), Compensation - Stock Compensation (Topic 718), and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40), which clarifies existing guidance for freestanding written call options which are equity classified and remain so after they are modified or exchanged in order to reduce diversity in practice. The standard is effective for public entities in fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. The Company adopted the standard during the quarter, which did not have an impact on the Company's condensed consolidated financial statements. Recently Issued Accounting Standards Not Yet Adopted In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848), which provides optional expedients and exceptions to contract modifications and hedging relationships that reference the London Interbank Offered Rate or another reference rate expected to be discontinued. The standard is effective upon issuance and may be applied at the beginning of the interim period that includes March 12, 2020 through December 31, 2022. In January 2021, the FASB issued ASU 2021-01, which clarified the scope of Topic 848 to include derivatives that are affected by a change in the interest rate used for margining, discounting, or contract price alignment that do not also reference London Interbank Offered Rate or another reference rate that is expected to be discontinued as a result of the reference rate reform. The standard is effective upon issuance and may be applied retroactively as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020, or prospectively to any new modifications within an interim period including or subsequent to January 7, 2021. The Company is evaluating the impact on the Company’s consolidated financial statements. In March 2022, the FASB issued ASU 2022-01, Derivatives and Hedging (Topic 815), which clarifies the guidance on fair value hedge accounting of interest rate risk for portfolios of financial assets. The standard is effective for public entities in fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Early adoption is permitted on any date on or after the issuance of ASU 2017-12. The Company is evaluating the impact on the Company’s consolidated financial statements. There are other new accounting pronouncements issued by the FASB that the Company has adopted or will adopt, as applicable, and the Company does not believe any of these accounting pronouncements have had, or will have, a material impact on its consolidated financial statements or disclosures.
Revision of Previously Issued Financial Statements	Revision of Previously Issued Financial StatementsThe condensed consolidated statements of cash flows for the three months ended March 31, 2021 has been revised to correct for errors identified by management during the preparation of the financial statements for the three months ended March 31, 2022. The errors understated cash flows from operating activities by $112 million and overstated the cash flows from financing activities by $112 million for the three months ended March 31, 2021. Management has determined that these errors did not result in the previously issued financial statements being materially misstated. These errors primarily related to the timing of tax payments from the net settlement of equity awards at the initial public offering in December 2020. In particular, in 2020, the Company reported $1.65 billion of cash used in financing activities to cover taxes paid related to the net share settlement of its equity awards that vested upon the initial public offering. However, approximately $123 million of this amount was actually remitted to taxing authorities in foreign jurisdictions in 2021, of which $116 million was remitted in the first quarter of 2021. This had no impact on the Company’s condensed consolidated financial statements outside of the presentation in the condensed consolidated statements of cash flow and did not affect the condensed consolidated balance sheets, condensed consolidated statements of operations or condensed consolidated statements of stockholders’ equity.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2022

The accompanying unaudited condensed consolidated financial statements (“condensed consolidated financial statements”) have been prepared in conformity with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and the applicable rules and regulations of the Securities and Exchange Commission (the “SEC”) regarding interim financial information. Certain information and note disclosures normally included in the consolidated financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. As such, the information included in this Quarterly Report on Form 10-Q should be read in conjunction with the audited consolidated financial statements and the related notes thereto as of and for the year ended December 31, 2021, included in our Annual Report on Form 10-K, filed with the SEC on February 25, 2022. There have been no changes to the Company’s significant accounting policies described in the Annual Report on Form 10-K for the year ended December 31, 2021 that have had a material impact on our condensed consolidated financial statements and related notes.

The results for the interim periods are not necessarily indicative of results for the full year. The accompanying condensed consolidated financial statements include accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

In the opinion of management, these condensed consolidated financial statements reflect all adjustments, consisting only of normal recurring adjustments, which are necessary for the fair statement of the condensed consolidated financial position, results of operations and cash flows for these interim periods.

Principles of Consolidation

The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries and variable interest entities (“VIE”) in which the Company is the primary beneficiary in accordance with consolidation accounting guidance. All intercompany transactions have been eliminated in consolidation.

The Company determines, at the inception of each arrangement, whether an entity in which it has made an investment or in which it has other variable interest in is considered a VIE. The Company consolidates a VIE when it is deemed to be the primary beneficiary. The primary beneficiary of a VIE is the party that meets both of the following criteria: (i) has the power to direct the activities that most significantly affect the economic performance of the VIE; and (ii) has the obligation to absorb losses or the right to receive benefits that in either case could potentially be significant to the VIE. Periodically, the Company determines whether any changes in its interest or relationship with the entity impact the determination of whether the entity is still a VIE and, if so, whether the Company is the primary beneficiary. If the Company is not deemed to be the primary beneficiary in a VIE, the Company accounts for the investment or other variable interest in a VIE in accordance with applicable U.S. GAAP. As of March 31, 2022, the Company’s consolidated VIEs were not material to the condensed consolidated financial statements.

Use of Estimates

The preparation of the Company’s condensed consolidated financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. The Company regularly evaluates its estimates, including those related to bad debt reserves, fair value of investments, useful lives of long-lived assets and intangible assets, valuation of acquired goodwill and intangible assets from acquisitions, contingent liabilities, insurance reserves, revenue recognition, valuation of common stock, stock-based compensation, and income and non-income taxes, among others. Actual results could differ materially from these estimates.

As the impact of the COVID-19 pandemic continues to evolve, estimates and assumptions about future events and their effects cannot be determined with certainty and therefore require increased judgment. These estimates and assumptions may change in future periods and will be recognized in the consolidated financial statements as new events occur and additional information becomes known. To the extent the Company’s actual results differ materially from those estimates and assumptions, the Company’s future consolidated financial statements could be affected.

Recently Adopted Accounting Standards and Recently Issued Accounting Standards Not Yet Adopted

Recently Adopted Accounting Standards

In May 2021, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2021-04 Earnings Per Share (Topic 260), Debt - Modifications and Extinguishments (Topic 470-50), Compensation - Stock Compensation (Topic 718), and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40), which clarifies existing guidance for freestanding written call options which are equity classified and remain so after they are modified or exchanged in order to reduce diversity in practice. The standard is effective for public entities in fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. The Company adopted the standard during the quarter, which did not have an impact on the Company's condensed consolidated financial statements.

Recently Issued Accounting Standards Not Yet Adopted

In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848), which provides optional expedients and exceptions to contract modifications and hedging relationships that reference the London Interbank Offered Rate or another reference rate expected to be discontinued. The standard is effective upon issuance and may be applied at the beginning of the interim period that includes March 12, 2020 through December 31, 2022. In January 2021, the FASB issued ASU 2021-01, which clarified the scope of Topic 848 to include derivatives that are affected by a change in the interest rate used for margining, discounting, or contract price alignment that do not also reference London Interbank Offered Rate or another reference rate that is expected to be discontinued as a result of the reference rate reform. The standard is effective upon issuance and may be applied retroactively as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020, or prospectively to any new modifications within an interim period including or subsequent to January 7, 2021. The Company is evaluating the impact on the Company’s consolidated financial statements.

In March 2022, the FASB issued ASU 2022-01, Derivatives and Hedging (Topic 815), which clarifies the guidance on fair value hedge accounting of interest rate risk for portfolios of financial assets. The standard is effective for public entities in fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Early adoption is permitted on any date on or after the issuance of ASU 2017-12. The Company is evaluating the impact on the Company’s consolidated financial statements.

There are other new accounting pronouncements issued by the FASB that the Company has adopted or will adopt, as applicable, and the Company does not believe any of these accounting pronouncements have had, or will have, a material impact on its consolidated financial statements or disclosures.

Revision of Previously Issued Financial Statements

Revision of Previously Issued Financial StatementsThe condensed consolidated statements of cash flows for the three months ended March 31, 2021 has been revised to correct for errors identified by management during the preparation of the financial statements for the three months ended March 31, 2022. The errors understated cash flows from operating activities by $112 million and overstated the cash flows from financing activities by $112 million for the three months ended March 31, 2021. Management has determined that these errors did not result in the previously issued financial statements being materially misstated. These errors primarily related to the timing of tax payments from the net settlement of equity awards at the initial public offering in December 2020. In particular, in 2020, the Company reported $1.65 billion of cash used in financing activities to cover taxes paid related to the net share settlement of its equity awards that vested upon the initial public offering. However, approximately $123 million of this amount was actually remitted to taxing authorities in foreign jurisdictions in 2021, of which $116 million was remitted in the first quarter of 2021. This had no impact on the Company’s condensed consolidated financial statements outside of the presentation in the condensed consolidated statements of cash flow and did not affect the condensed consolidated balance sheets, condensed consolidated statements of operations or condensed consolidated statements of stockholders’ equity.