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Net Sales - Summary of Net Sales (Detail) - SEK (kr)
kr in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of net sales [line items]      
Net sales kr 263,351 kr 271,546 kr 232,314
Of which IPR licensing revenues 11,101 10,399 8,134
Of which export sales from Sweden 125,242 153,833 140,898
Hardware [member]      
Disclosure of net sales [line items]      
Net sales 99,642 119,215 106,399
Software [member]      
Disclosure of net sales [line items]      
Net sales 59,123 54,809 45,798
Services [member]      
Disclosure of net sales [line items]      
Net sales kr 104,586 kr 97,522 kr 80,117