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SEGMENT INFORMATION (Segment Assets) (Details) - USD ($)
$ in Millions
Oct. 31, 2015
Oct. 31, 2014
Segment Reporting [Abstract]    
Total reportable segments' assets $ 2,796 $ 1,976
Cash, cash equivalents and short-term investments 483 810
Prepaid expenses 98 51
Other current assets 2 9
Investments 70 63
Long-term and other receivables 57 33
Other 2 108
Total assets $ 3,508 $ 3,050