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Description of Business and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020
Description Of Business And Summary Of Significant Accounting Policies [Line Items] |  |  |
Accumulated deficit | $ (8,083,393) |  | $ (7,891,542)
Additional paid-in capital | 9,777,646 |  | 10,200,141
Convertible senior notes, net | $ 2,245,203 |  | $ 1,675,169
Accounting Standards Update 2020-06 |  |  |
Description Of Business And Summary Of Significant Accounting Policies [Line Items] |  |  |
Change in accounting principle, accounting standards update, adoption date | Jan. 01, 2021 |  |
Change in accounting principle, accounting standards update, early adoption [true false] | true |  |
Change in accounting principle, accounting standards update, transition option elected | snap:AccountingStandardsUpdate202006RetrospectiveMember |  |
Change in accounting principle, accounting standards update, adopted [true false] | true |  |
Accounting Standards Update 2020-06 | Revision of Prior Period, Accounting Standards Update, Adjustment |  |  |
Description Of Business And Summary Of Significant Accounting Policies [Line Items] |  |  |
Accumulated deficit |  | $ (95,000) |
Additional paid-in capital |  | (664,000) |
Convertible senior notes, net |  | $ 569,000 |
Accounting Standards Update 2020-01 |  |  |
Description Of Business And Summary Of Significant Accounting Policies [Line Items] |  |  |
Change in accounting principle, accounting standards update, adoption date | Jan. 01, 2021 |  |
Change in accounting principle, accounting standards update, transition option elected | snap:AccountingStandardsUpdate202001ProspectiveMember |  |
Change in accounting principle, accounting standards update, adopted [true false] | true |  |
Change in accounting principle, accounting standards update, immaterial effect [true false] | true |  |

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- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 65 -Paragraph 15 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333 Reference 2: 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(30)(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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