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FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Net recognized gains losses on equity securities) (Tables)
6 Months Ended
Apr. 30, 2019
Investments, Debt and Equity Securities [Abstract]  
Gain (Loss) on Securities [Table Text Block]
Net recognized gains (losses) on equity investments were as follows:
 
Three Months Ended
Six Months Ended
 
April 30, 2019
 
(in millions)
Net realized gains on investments sold
$
1

 
$
1

Net unrealized gains (losses) on investments still held
(2
)
 
3

Other-than-temporary impairments of investments

 

Total
$
(1
)
 
$
4