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Inventories - Summary of Inventories (Detail) - SEK (kr)
kr in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Inventories [Abstract]    
Components kr 6,948 kr 10,612
Finished goods 11,701 13,610
Contract work in progress 8,476 11,851
Inventories, net kr 27,125 kr 36,073