v3.21.2
Stock-based Compensation - Additional information (Detail)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2021
shares
Sep. 30, 2020
shares
Sep. 30, 2021
Number
shares
Sep. 30, 2020
shares
Dec. 31, 2020
Number
shares
Two Thousand And Seventeen Equity Incentive Plan [Member]            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Share based compensation arrangement by share based payment award, Number of vesting schedules | Number           2
Two Thousand And Seventeen Equity Incentive Plan [Member] | Bird Rides [Member]            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Share based compensation arrangement by share based payment award, Award vesting period       4 years   4 years
Share based compensation arrangement by share based payment award, Number of vesting schedules | Number       2    
One Vesting Schedule [Member] | Two Thousand And Seventeen Equity Incentive Plan [Member] | Bird Rides [Member]            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Share based compensation arrangement by share based payment award, Award vesting period       3 years   3 years
Share based compensation arrangement by share based payment award, Award vesting period, Period of cliff vest       1 year   1 year
Share based compensation arrangement by share based payment award, Vesting basis       monthly   monthly
Second Vesting Schedule [Member] | Two Thousand And Seventeen Equity Incentive Plan [Member] | Bird Rides [Member]            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Share based compensation arrangement by share based payment award, Award vesting period       4 years   4 years
Share based compensation arrangement by share based payment award, Vesting basis       monthly   monthly
Incentive And Nonqualified Stock Options [Member] | Two Thousand And Seventeen Equity Incentive Plan [Member]            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Share based compensation arrangement by share based payment award, Shares issued in period           46,100,000
Incentive And Nonqualified Stock Options [Member] | Two Thousand And Seventeen Equity Incentive Plan [Member] | Bird Rides [Member]            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Share based compensation arrangement by share based payment award, Shares issued in period       47,100,000    
Share-based Payment Arrangement, Option [Member] | Bird Rides [Member]            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Share based compensation arrangement by share based payment award, Options, Grants in period, Gross   0 2,600,000 300,000 12,400,000  
Restricted Stock Units (RSUs) [Member] | Bird Rides [Member]            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Share based compensation arrangement by share based payment award, Equity instruments other than options, Grants in period   1,000,000.0   5,800,000    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights The RSUs are subject to two vesting requirements: (i) a service-based or milestone-based requirement and (ii) a liquidation event requirement. The RSUs will vest when both requirements are satisfied.          
Restricted Stock [Member] | Bird Rides [Member]            
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]            
Share based compensation arrangement by share based payment award, Vesting basis       monthly    
Share based compensation arrangement by share based payment award, Equity instruments other than options, Grants in period   0 0 0 4,800,000  
Share based compensation arrangement by share based payment award, Equity instruments other than options, Grants in period, Subject to vesting rights         0