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STOCKHOLDER'S EQUITY - Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance $ (437) $ (357) $ (479) $ (336)
OCI, before Reclassifications, before Tax, Attributable to Parent (5) (20) 21 (47)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent 10 3 32 9
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent (1) (2) (7) (2)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 4 (19) 46 (40)
Ending balance (433) (376) (433) (376)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 14 24 21 16
OCI, before Reclassifications, before Tax, Attributable to Parent 1 (5) (7) 4
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent 0 0 0 0
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent 1 (2) 2 (3)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 2 (7) (5) 1
Ending balance 16 17 16 17
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (17) (28) (48) 6
OCI, before Reclassifications, before Tax, Attributable to Parent (1) (12) 30 (46)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent 0 0 0 0
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent 0 0 0 0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent (1) (12) 30 (46)
Ending balance (18) (40) (18) (40)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (489) (428) (511) (444)
OCI, before Reclassifications, before Tax, Attributable to Parent 0 0 4 0
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent 14 11 42 33
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent (5) (4) (15) (10)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 9 7 31 23
Ending balance (480) (421) (480) (421)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 57 75 65 83
OCI, before Reclassifications, before Tax, Attributable to Parent 0 0 0 0
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent (6) (8) (19) (22)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent 2 3 7 9
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent (4) (5) (12) (13)
Ending balance 53 (70) 53 (70)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (2) 0 (6) 3
OCI, before Reclassifications, before Tax, Attributable to Parent (5) (3) (6) (5)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent 2 0 9 (2)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent 1 1 (1) 2
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent (2) (2) 2 (5)
Ending balance $ (4) $ (2) $ (4) $ (2)