General form of registration statement for all companies including face-amount certificate companies

DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (Details)

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DESCRIPTION OF ORGANIZATION AND BUSINESS OPERATIONS (Details) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jul. 01, 2019
May 31, 2019
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2020
Apr. 10, 2019
Dec. 31, 2018
Shares Issued, Price Per Share $ 10.00                
Proceeds from Issuance Initial Public Offering           $ 677,788,000      
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 11.50                
Proceeds from Issuance of Warrants           15,800,000      
Transaction Cost Related To Issuance Of Common Stock $ 34,319,807                
Underwriting Fees 12,212,000                
Underwriting Discount 12,212,000                
Deferred Underwriting Discount Payable Non current 21,371,000                
Other Offering Costs Related To Issuance Of Common Stock 736,807                
Other Costs Related To Issuance Of Common Stock 736,807                
Working Capital Requirement Fund Annual Limit $ 250,000                
Temporary Equity, Redemption Price Per Share $ 10.00                
Maximum Percentage Of Shares Eligible From Redemption 15.00%                
Dissolution Expenses Payable $ 100,000                
Cash     $ 2,382,560 $ 2,014,521 $ 2,238,275 2,238,275 $ 3,873,865 $ 2,238,275 $ 0
Working capital     1,182,603            
Marketable securities held in Trust Account     697,018,229   $ 695,295,418 $ 695,295,418 $ 696,957,196    
Amount deposited in trust account     $ 7,018,000            
IPO [Member]                  
Stock Issued During Period, Shares, New Issues 69,000,000                
Shares Issued, Price Per Share $ 10.00                
Proceeds from Issuance Initial Public Offering $ 690,000,000                
Over-Allotment Option [Member]                  
Stock Issued During Period, Shares, New Issues 9,000,000                
Shares Issued, Price Per Share $ 10.00                
Private Placement [Member]                  
Number Of Warrants Issued 15,800,000                
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 1.00                
Proceeds from Issuance of Warrants $ 15,800,000                
Churchill Sponsor LLC [Member]                  
Business Combination Aggregate Fair Market Value On Assets Held In Trust Percentage 80.00%                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets $ 5,000,001                
Class B Common Stock [Member]                  
Stock Issued During Period, Shares, New Issues   8,625,000   0 17,250,000