Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Additional Information (Detail)

v3.21.2
Fair Value Measurements - Additional Information (Detail) - Bird Rides [Member] - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Discount rate based on the stage of development and expected rate of return     25.00%    
Nonoperating Income (Expense) [Member]          
Derivative, Gain loss on derivative, Net $ 6.4 $ 0.0 $ 53.6 $ 0.1  
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]          
Financial liabilities fair value disclosure 142.8   142.8   $ 1.1
Warrants and rights outstanding         0.6
Derivative Liability Noncurrent [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Embedded Derivative Financial Instruments [Member]          
Derivative liability 100.8   100.8    
Derivative Liability Noncurrent [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Warrant [Member]          
Derivative liability $ 41.9   $ 41.9   $ 0.5
Maximum [Member]          
Number of months determining redemption or exercise scenarios     16 months    
Minimum [Member]          
Number of months determining redemption or exercise scenarios     1 month