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Investments in equity-accounted associates and joint ventures (Tables)
 12 Months Ended
Oct. 31, 2020
Text block [abstract]  
Summary of Aggregate Financial Information Related to Proportionate Interest in the Equity-accounted Joint Ventures
The following table provides the summarized aggregate financial information related to our proportionate interest in the equity-accounted joint ventures:
 
$ millions, for the year ended October 31
  
2020
 
  
2019
 
  
2018
 
Net income
  
$
67
 
  
$
88
 
  
$
106
 
OCI
  
 
43
 
  
 
45
 
  
 
(12
) 
Total comprehensive income
  
$
    110
 
  
$
  133
 
  
$
      94
 
Summary of Aggregate Financial Information Related to Proportionate Interest in Equity-accounted Associates
The following table provides the summarized aggregate financial information related to our proportionate interest in equity-accounted associates:
 
$ millions, for the year ended October 31
  
2020
 
  
2019
 
 
2018
 
Net income
  
$
12
 
  
$
4
 
 
$
15
 
OCI
  
 
1
 
  
 
(1
) 
 
 
(7
) 
Total comprehensive income
  
$
    13
 
  
$
    3
 
 
$
      8