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

Acquisitions - Additional Information (Detail)

v3.21.2
Acquisitions - Additional Information (Detail) - Bird Rides [Member] - USD ($)
$ in Thousands
 1 Months Ended 9 Months Ended 12 Months Ended
Jul. 11, 2019
Jan. 31, 2020
Sep. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Sep. 30, 2020
Jul. 15, 2019
Business Acquisition [Line Items]              
Debt Conversion, Converted Instrument, Amount         $ 8,271    
Debt Instrument, Unamortized Discount             $ 5,000
Goodwill     $ 124,059 $ 131,255 $ 1,296    
CIRC [Member]              
Business Acquisition [Line Items]              
Business combination, Recognized identifiable assets acquired and liabilities assumed, Cash and equivalents   $ 68,700   68,700      
Business combination, Recognized identifiable assets acquired and liabilities assumed, Intangible assets, Other than goodwill   5,500   5,500      
Business acquisition, Transaction costs       3,500   $ 3,500  
Business Combination, Consideration Transferred     190,000 190,000      
Goodwill     $ 116,709 116,709      
Scoot [Member]              
Business Acquisition [Line Items]              
Business Combination, Consideration Transferred $ 8,600            
Payments to Acquire Businesses, Gross 500            
Debt Conversion, Converted Instrument, Amount 8,300            
Debt Instrument, Unamortized Discount 200            
Goodwill $ 1,300            
Series D and SeriesD Two Redeemable Convertible Preferred Stock [Member] | CIRC [Member]              
Business Acquisition [Line Items]              
Business combination, Consideration transferred, Equity interests issued and issuable   $ 190,000   $ 190,000      
Series D-1 Redeemable Convertible Preferred Stock [Member] | Scoot [Member]              
Business Acquisition [Line Items]              
Number of shares of equity interests issued         640,261