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Restructuring Plans - (Additional Information) (Details)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Oct. 03, 2021
USD ($)
Jul. 04, 2021
USD ($)
Oct. 04, 2020
USD ($)
Oct. 03, 2021
USD ($)
Oct. 04, 2020
USD ($)
Mar. 31, 2021
USD ($)
Employee
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Restructuring Cost and Reserve [Line Items]                
Expected remaining cost $ 2,447     $ 2,447        
Restructuring and other exit charges 2,857   $ 3,119 10,689 $ 4,506      
Inventory adjustment relating to exit activities 960   $ 0 960 0      
Proceeds from disposal of facility       3,268 $ 0      
Employee Severance                
Restructuring Cost and Reserve [Line Items]                
Restructuring charges 1,013     2,339        
Exit charges 1,844     8,350        
Restructuring and other exit charges 2,857     10,689        
Restructuring costs incurred       3,400        
Employee Severance | Energy Systems                
Restructuring Cost and Reserve [Line Items]                
Restructuring charges 161     1,019        
Exit charges 0     (370)        
Restructuring and other exit charges 161     649        
Employee Severance | Motive Power                
Restructuring Cost and Reserve [Line Items]                
Restructuring charges 849     1,281        
Exit charges 1,827     9,928        
Restructuring and other exit charges 2,676     11,209        
Employee Severance | Specialty                
Restructuring Cost and Reserve [Line Items]                
Restructuring charges 3     39        
Exit charges 17     (1,208)        
Restructuring and other exit charges 20     (1,169)        
Closure of Facility in Hagen, Germany                
Restructuring Cost and Reserve [Line Items]                
Expected additional restructuring charges 60,000     60,000        
Estimated number of positions eliminated | Employee           200    
Inventory adjustment relating to exit activities       960        
Closure of Facility in Hagen, Germany | Cash charges                
Restructuring Cost and Reserve [Line Items]                
Expected additional restructuring charges 40,000     40,000        
Closure of Facility in Hagen, Germany | Severance, Cash Charges                
Restructuring Cost and Reserve [Line Items]                
Restructuring charges           $ 23,331    
Closure of Facility in Hagen, Germany | Non Cash Charges                
Restructuring Cost and Reserve [Line Items]                
Expected additional restructuring charges 20,000     20,000        
Closure of Facility in Hagen, Germany | Severance, Non Cash Charges                
Restructuring Cost and Reserve [Line Items]                
Restructuring charges       3,635   7,946    
Closure of Facility in Hagen, Germany | Employee Severance                
Restructuring Cost and Reserve [Line Items]                
Restructuring charges       6,663        
Closure Of Facility In Targovishte Bulgaria                
Restructuring Cost and Reserve [Line Items]                
Expected remaining cost               $ 26,000
Restructuring and other exit charges           220 $ 5,123 $ 20,242
Proceeds from disposal of facility       1,489        
Gain on disposal of facility       1,208        
Closure of Facility in Samudio, Spain                
Restructuring Cost and Reserve [Line Items]                
Gain on disposal of facility   $ 1,779            
Proceeds for sale of certain licenses and assets   $ 740            
Richmond Kentucky Battery Formation Area Fire                
Restructuring Cost and Reserve [Line Items]                
Prepaid Insurance $ 18,144     18,144        
Richmond Kentucky Battery Formation Area Fire | Cleanup                
Restructuring Cost and Reserve [Line Items]                
Restructuring and other exit charges       15,316        
Richmond Kentucky Battery Formation Area Fire | Business Interruption                
Restructuring Cost and Reserve [Line Items]                
Restructuring costs incurred       $ 5,156        
Closure Of Facility In Vijayawada India                
Restructuring Cost and Reserve [Line Items]                
Exit charges           $ 1,509