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Financial Risk Management - Summary of Net Exposure for Largest Currencies Impact on Sales (Detail)
kr in Billions
 12 Months Ended
Dec. 31, 2023
SEK (kr)
USD [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure kr 81.7
Sales transaction exposure 55.6
Sales net exposure 137.3
Cost translation exposure (62.2)
Cost transaction exposure (42.4)
Cost net exposure (104.6)
EUR [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 40.9
Sales transaction exposure (0.5)
Sales net exposure 40.4
Cost translation exposure (37.3)
Cost transaction exposure (2.6)
Cost net exposure (39.9)
INR [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 31.2
Sales transaction exposure (0.7)
Sales net exposure 30.5
Cost translation exposure (19.9)
Cost transaction exposure 0.2
Cost net exposure (19.7)
JPY [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 10.1
Sales transaction exposure 0.0
Sales net exposure 10.1
Cost translation exposure (4.1)
Cost transaction exposure 0.0
Cost net exposure (4.1)
GBP [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 9.1
Sales transaction exposure (1.0)
Sales net exposure 8.1
Cost translation exposure (3.6)
Cost transaction exposure 0.0
Cost net exposure (3.6)
CNY [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 7.8
Sales transaction exposure 0.0
Sales net exposure 7.8
Cost translation exposure (5.7)
Cost transaction exposure 1.1
Cost net exposure (4.6)
SAR [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 5.6
Sales transaction exposure 0.4
Sales net exposure 6.0
Cost translation exposure (3.5)
Cost transaction exposure 0.1
Cost net exposure (3.4)
BRL [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 5.0
Sales transaction exposure 0.0
Sales net exposure 5.0
Cost translation exposure (4.1)
Cost transaction exposure 1.2
Cost net exposure kr (2.9)