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Provisions - Additional Information (Detail) - SEK (kr)
kr in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of Provisions [line items]      
Non-current provisions kr 3,511 kr 4,927  
Provisions 11,715 11,706 kr 11,588
Additional provisions, other provisions 9,345 10,477  
Restructuring [member]      
Disclosure of Provisions [line items]      
Non-current provisions 879 855  
Provisions kr 3,872 3,720 669
Description of expected timing of outflows, other provisions 1 year    
Utilization of provisions kr 4,200 2,900  
Additional provisions, other provisions 4,498 6,082  
Customer Related Provision [member]      
Disclosure of Provisions [line items]      
Non-current provisions 112 1,873  
Provisions kr 1,760 2,857 3,093
Description of expected timing of outflows, other provisions 1 year    
Additional provisions, other provisions kr 686 481  
Suppliers Related Provision [member]      
Disclosure of Provisions [line items]      
Non-current provisions 469 608  
Provisions kr 743 954 722
Description of expected timing of outflows, other provisions 2 years    
Additional provisions, other provisions kr 324 849  
Warranty [member]      
Disclosure of Provisions [line items]      
Non-current provisions 206 251  
Provisions kr 766 956 678
Description of expected timing of outflows, other provisions 1 year    
Additional provisions, other provisions kr 389 831  
Provision for Share Based Payments [member]      
Disclosure of Provisions [line items]      
Non-current provisions 1,359 682  
Provisions kr 2,992 1,584 kr 985
Description of expected timing of outflows, other provisions 3 years    
Additional provisions, other provisions kr 2,209 kr 1,410