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Contingent Liabilities - Additional Information (Detail) - SEK (kr)
kr in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure of Contingent Liabilities [Line Items]    
Contingent liabilities kr 3,037 kr 3,322
Sweden [member]    
Disclosure of Contingent Liabilities [Line Items]    
Contingent liabilities kr 600 kr 500