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STOCKHOLDER'S EQUITY - Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2017
Apr. 30, 2016
Apr. 30, 2017
Apr. 30, 2016
Beginning Balance $ (489)   $ (503)  
Other comprehensive income (loss), before reclassifications 7   8  
Amounts reclassified out of accumulated other comprehensive income (loss) 8   27  
Tax (expense) benefit (3)   (9)  
Other comprehensive income (loss) 12 $ 139 26 $ 92
Ending Balance (477)   (477)  
Foreign currency translation        
Beginning balance (200)   (197)  
Other comprehensive income (loss) before reclassifications 8   4  
Amounts reclassified out of accumulated other comprehensive income (loss) 0   0  
Tax (expense) benefit (1) (8) 0 (7)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax 7 145 4 89
Ending balance (193)   (193)  
Prior service credits        
Beginning balance 145   146  
Other comprehensive income (loss) before reclassifications 0   0  
Amounts reclassified out of accumulated other comprehensive income (loss) (3) (4) (5) (23)
Tax (expense) benefit 1   2  
Other comprehensive income (loss) (2) (3) (3) (11)
Ending balance 143   143  
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Actuarial Gain (Loss), before Tax        
Beginning balance (434)   (451)  
Other comprehensive income (loss) before reclassifications 0   3  
Amounts reclassified out of accumulated other comprehensive income (loss) 12 9 34 22
Tax (expense) benefit (3)   (11)  
Other comprehensive income (loss) 9 $ 6 26 $ 21
Ending balance (425)   (425)  
Unrealized gains (losses) on derivatives        
Beginning balance 0   (1)  
Other comprehensive income (loss) before reclassifications (1)   1  
Amounts reclassified out of accumulated other comprehensive income (loss) (1)   (2)  
Tax (expense) benefit 0   0  
Other comprehensive income (loss) (2)   (1)  
Ending balance $ (2)   $ (2)