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DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (Details) |  |  |  |  | 11 Months Ended |  |
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Feb. 12, 2021 USD ($) Vote $ / shares shares | Jun. 26, 2020 USD ($) $ / shares shares | Jun. 09, 2020 USD ($) $ / shares shares | May 26, 2020 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) shares | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($)
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Obligation to redeem Public Shares if entity does not complete a Business Combination (as a percent) |  |  |  |  | 100.00% |  |
Net proceeds deposited in Trust Account |  |  |  |  | $ 414,000,000 |  |
Aggregate proceeds held in Trust Account |  |  |  |  | 414,333,909 | $ 414,222,151 | $ 414,057,130
Transaction costs |  |  |  |  | 23,491,852 |  |
Underwriting fees |  |  |  |  | 8,280,000 |  |
Deferred underwriting fees |  |  |  |  | 14,490,000 | $ 14,490,000 | $ 14,490,000
Other costs |  |  |  |  | $ 721,852 |  |
Options |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Conversion ratio to receive shares upon merger | 1.0383 |  |  |  |  |  |
Conversion ratio to receive shares upon exercise of option | 1.0383 |  |  |  |  |  |
Private Placement Warrants [Member] |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Units issued (in shares) | shares |  | 186,667 | 533,333 | 6,133,333 |  |  |
Purchase price | $ / shares |  | $ 1.50 | $ 1.50 | $ 1.50 |  |  |
Gross proceeds from issuance of warrants |  | $ 280,000 | $ 800,000 | $ 9,200,000 |  |  |
Initial Public Offering [Member] |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Units issued (in shares) | shares |  |  |  |  | 41,400,000 |  |
Gross proceeds from initial public offering |  |  |  | 360,000,000 |  |  |
Net proceeds from initial public offering |  |  |  | $ 360,000,000 |  |  |
Net proceeds from initial public offering and private placement per unit (in dollars per share) | $ / shares |  |  |  | $ 10.00 |  |  |
Transaction costs |  |  |  |  | $ 23,205,663 |  |
Initial Public Offering [Member] | Public Shares [Member] |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Units issued (in shares) | shares |  |  |  | 36,000,000 |  |  |
Over-Allotment Option [Member] |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Units issued (in shares) | shares |  | 1,400,000 | 4,000,000 |  |  |  |
Purchase price | $ / shares |  | $ 10.00 | $ 10.00 |  |  |  |
Gross proceeds from initial public offering |  | $ 14,000,000 | $ 40,000,000 |  |  |  |
Net proceeds deposited in Trust Account |  | 14,000,000 | 40,000,000 |  |  |  |
Aggregate proceeds held in Trust Account |  | $ 414,000,000 | $ 400,000,000 |  |  |  |
Class A Common Stock |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Stock conversion basis at time of business combination |  |  |  |  | 1 |  |
Conversion of principal amount plus accrued interest into shares upon merger | $ / shares | $ 10.00 |  |  |  |  |  |
Number of votes | Vote | 1 |  |  |  |  |  |
Shares outstanding prior to business combination | shares | 164,862,472 |  |  |  |  |  |
Class A Common Stock | Forward purchase agreement |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Purchase price | $ / shares | $ 10.00 |  |  |  |  |  |
Forward purchase agreement, Maximum value of shares purchased | $ 75,000,000 |  |  |  |  |  |
Forward purchase agreement, maximum number of shares | shares | 7,500,000 |  |  |  |  |  |
Class A Common Stock | Legacy Longview Acquisition Corp |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Stock conversion basis at time of business combination | 1 |  |  |  |  |  |
Shares outstanding prior to business combination | shares | 10,350,000 |  |  |  |  |  |
Class A Common Stock | Legacy Butterfly Network Inc |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Conversion ratio to receive shares upon merger | 1.0383 |  |  |  |  |  |
Class A Common Stock | Legacy butterfly stockholders |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Shares outstanding prior to business combination | shares | 95,633,661 |  |  |  |  |  |
Class A Common Stock | Longview stock holders |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Shares outstanding prior to business combination | shares | 41,378,811 |  |  |  |  |  |
Class A Common Stock | PIPE Investment |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Purchase price | $ / shares | $ 10.00 |  |  |  |  |  |
Subscription agreement, shares issued to PIPE investors | shares | 17,500,000 |  |  |  |  |  |
Shares outstanding prior to business combination | shares | 17,500,000 |  |  |  |  |  |
Class B Common Stock |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Number of votes | Vote | 20 |  |  |  |  |  |
Percentage of shares cease to own upon recapitalization | 20.00% |  |  |  |  |  |
Shares issued upon closing of business combination | shares | 26,426,937 |  |  |  |  |  |
Class B Common Stock | Legacy Butterfly Network Inc |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Conversion ratio to receive shares upon merger | 1.0383 |  |  |  |  |  |
Class B Common Stock | Dr.Rothberg |  |  |  |  |  |  |
Proceeds from Issuance of Equity [Abstract] |  |  |  |  |  |  |
Percentage of equity interest held | 76.50% |  |  |  |  |  |

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