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        Taxonomy & unit
      
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        us-gaap: shares
      
      
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        Description
      
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        The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.
      
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        Summary
      
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        Canadian Pacific Kansas City Ltd/Cn quarterly/annual Weighted Average Number of Shares Outstanding, Diluted history and growth rate from 2010 to 2024.- Canadian Pacific Kansas City Ltd/Cn Weighted Average Number of Shares Outstanding, Diluted for the quarter ending September 30, 2025 was 911M shares, a 2.56% decline year-over-year.
- Canadian Pacific Kansas City Ltd/Cn annual Weighted Average Number of Shares Outstanding, Diluted for 2024 was 935M shares, a 0.1% increase from 2023.
- Canadian Pacific Kansas City Ltd/Cn annual Weighted Average Number of Shares Outstanding, Diluted for 2023 was 934M shares, a 0.09% increase from 2022.
- Canadian Pacific Kansas City Ltd/Cn annual Weighted Average Number of Shares Outstanding, Diluted for 2022 was 933M shares, a 36.6% increase from 2021.
 
 
 
  
  Weighted Average Number of Shares Outstanding, Diluted, Annual (shares)
  
    
  Weighted Average Number of Shares Outstanding, Diluted, YoY Annual Growth (%)