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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, 2024
SEK (kr)
Disclosure Of Currency Exposure [Line Items]  
Sales transaction exposure kr (0.2)
Cost transaction exposure (0.1)
USD [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 93.8
Sales transaction exposure 41.7
Sales net exposure 135.5
Cost translation exposure (59.0)
Cost transaction exposure (41.4)
Cost net exposure (100.4)
EUR [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 36.6
Sales transaction exposure 1.2
Sales net exposure 37.8
Cost translation exposure (30.7)
Cost transaction exposure (2.0)
Cost net exposure (32.7)
INR [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 15.1
Sales transaction exposure (0.8)
Sales net exposure 14.3
Cost translation exposure (8.5)
Cost transaction exposure 0.1
Cost net exposure (8.4)
JPY [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 9.0
Sales transaction exposure 0.0
Sales net exposure 9.0
Cost translation exposure (3.0)
Cost transaction exposure 0.0
Cost net exposure (3.0)
GBP [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 8.8
Sales transaction exposure (1.1)
Sales net exposure 7.7
Cost translation exposure (7.2)
Cost net exposure (7.3)
AUD [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 5.9
Sales net exposure 5.7
Cost translation exposure (4.4)
Cost transaction exposure 0.1
Cost net exposure (4.3)
CNY [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 (3.2)
Cost transaction exposure 1.0
Cost net exposure (2.2)
SAR [member]  
Disclosure Of Currency Exposure [Line Items]  
Sales translation exposure 4.7
Sales transaction exposure 0.3
Sales net exposure 5.0
Cost translation exposure (3.4)
Cost transaction exposure 0.1
Cost net exposure kr (3.3)