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COMMITMENTS AND CONTINGENCIES, HeartFlow Business Combination (Details) - USD ($)
Jul. 15, 2021
Sep. 30, 2021
Jul. 14, 2021
Mar. 18, 2021
Dec. 31, 2020
HeartFlow Business Combination [Abstract]          
Common stock subject to possible redemption (in shares)   69,000,000     0
Purchase price per share (in dollars per share)       $ 10.00  
Common stock subject to possible redemption   $ 690,000,000     $ 0
Forward Purchase Agreement [Member]          
HeartFlow Business Combination [Abstract]          
Purchase price per share (in dollars per share) $ 10.00        
Class A Common Stock [Member]          
HeartFlow Business Combination [Abstract]          
Common stock subject to possible redemption (in shares)   69,000,000     0
HeartFlow [Member]          
HeartFlow Business Combination [Abstract]          
Capital distribution amount $ 91,000,000        
Return of capital distribution amount 25,000,000        
Consulting agreement fee payable     $ 10,000,000    
HeartFlow [Member] | Minimum [Member]          
HeartFlow Business Combination [Abstract]          
Capital distribution amount $ 0        
HeartFlow [Member] | Forward Purchase Agreement [Member]          
HeartFlow Business Combination [Abstract]          
Purchase price per share (in dollars per share) $ 10.00        
Percentage in excess of Trust Account payout 25.00%        
Amount paid out of Trust Account $ 200,000,000        
HeartFlow [Member] | Forward Purchase Agreement [Member] | Maximum [Member]          
HeartFlow Business Combination [Abstract]          
Proceeds from FPA 345,000,000        
Common stock subject to possible redemption 25,000,000        
Amount in excess of Trust Account payout $ 25,000,000        
HeartFlow [Member] | Class A Common Stock [Member]          
HeartFlow Business Combination [Abstract]          
Common stock subject to possible redemption (in shares) 69,000,000        
Return of capital distribution amount per share (in dollars per share) $ 10.00