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        Taxonomy & unit
      
 
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        us-gaap: USD
      
 
    
    
      
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        Description
      
 
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        Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.
      
 
    
    
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        Summary
      
 
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        NorthWestern Energy Group, Inc. quarterly Other Liabilities, Noncurrent history and growth rate from Q4 2022 to Q3 2025.
- NorthWestern Energy Group, Inc. Other Liabilities, Noncurrent for the quarter ending September 30, 2025 was $287M, a 17.5% decline year-over-year.
 
       
     
   
  
  Other Liabilities, Noncurrent, Quarterly (USD)
  
    
  Other Liabilities, Noncurrent, YoY Quarterly Growth (%)