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Summary of Significant Accounting Policies - Additional Information (Details)
€ in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
EUR (€)
shares
Jun. 30, 2023
USD ($)
shares
Jun. 30, 2023
EUR (€)
shares
Jun. 30, 2023
USD ($)
shares
Jun. 30, 2023
USD ($)
Dec. 31, 2022
Oct. 18, 2022
shares
Jul. 18, 2022
USD ($)
Summary Of Significant Accounting Policy [Line Items]                
Percentage of guaranteed interest rate 5.00%   5.00%   5.00%      
Percentage of additional guaranteed interest rate 5.00%   5.00%   5.00%      
Percentage of guaranteed interest rate plus a variable component 1.62%   1.62%   1.62%      
Percentage of additional guaranteed interest rate plus variable component 3.12%   3.12%   3.12%      
Aggregate exit compensation payments obligation including guaranteed interest € 319.0   € 319.0   $ 348.1      
Expire date of exit compensation     Mar. 16, 2023 Mar. 16, 2023        
Annual recurring compensation obligation     € 10.6 $ 11.6        
Accrued annual recurring compensation obligation   $ 2.9   $ 5.7        
Number of shares tendered | shares 46,000 46,000 63,000 63,000        
Exit compensation payments € 0.8 $ 0.9 € 1.1 $ 1.2        
Adjustment [Member]                
Summary Of Significant Accounting Policy [Line Items]                
Increase in net loss attributable to the company   (5.8)   (11.4)        
Increase in comprehensive loss attributable to the company   $ (2.9)   $ (2.6)        
ASU 2021-08 [Member]                
Summary Of Significant Accounting Policy [Line Items]                
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true   true   true      
Change in Accounting Principle, Accounting Standards Update, Adoption Date Jul. 01, 2022   Jul. 01, 2022   Jul. 01, 2022      
Wells Fargo Credit Agreement [Member] | Acorn HoldCo, Inc., [Member]                
Summary Of Significant Accounting Policy [Line Items]                
Secured revolving credit facility amount         $ 400.0     $ 100.0
Wells Fargo Credit Agreement [Member] | Acorn HoldCo, Inc., [Member] | Maximum [Member]                
Summary Of Significant Accounting Policy [Line Items]                
Credit agreement current borrowing capacity         $ 400.0      
Adtran Networks SE [Member]                
Summary Of Significant Accounting Policy [Line Items]                
Number of shares tendered | shares 46,000 46,000 63,000 63,000        
Exit compensation payments € 0.8 $ 0.9 € 1.1 $ 1.2        
Equity method ownership percentage 34.60%   34.60%   34.60% 34.70%    
Adtran Networks SE [Member] | Maximum [Member]                
Summary Of Significant Accounting Policy [Line Items]                
Number of additional shares authorized to purchase | shares             15,346,544