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CONDENSED CONSOLIDATED STATEMENT OF EQUITY Statement - USD ($)
$ in Millions
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Retained Earnings [Member]
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Adjustment due to adoption of new accounting standards $ 6       $ 6  
Common Stock, Shares, Outstanding at Oct. 31, 2017   188,310,000        
Treasury Stock, Shares at Oct. 31, 2017       (2,289,000)    
Stockholders' Equity, Balance at Oct. 31, 2017 2,310 $ 2 $ 1,786 $ (62) 1,041 $ (457)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock (shares)   1,943,000        
Issuance of common stock ($) 17   17      
Share-based compensation 34   34      
Net Income 158       158  
Other Comprehensive Income (Loss), Net of Tax $ 38         38
Treasury Stock, Shares, Acquired (773,352)     (773,000)    
Treasury Stock, Value, Acquired, Cost Method $ (40)     $ (40)    
Common Stock, Shares, Outstanding at Apr. 30, 2018   190,253,000        
Treasury Stock, Shares at Apr. 30, 2018       (3,062,000)    
Stockholders' Equity, Balance at Apr. 30, 2018 2,523 $ 2 1,837 $ (102) 1,205 (419)
Common Stock, Shares, Outstanding at Jan. 31, 2018   189,800,000        
Treasury Stock, Shares at Jan. 31, 2018       (2,289,000)    
Stockholders' Equity, Balance at Jan. 31, 2018 2,484 $ 2 1,815 $ (62) 1,141 (412)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock (shares)   453,000        
Issuance of common stock ($) 8   8      
Share-based compensation 14   14      
Net Income 64       64  
Other Comprehensive Income (Loss), Net of Tax (7)         (7)
Treasury Stock, Shares, Acquired       (773,000)    
Treasury Stock, Value, Acquired, Cost Method (40)     $ (40)    
Common Stock, Shares, Outstanding at Apr. 30, 2018   190,253,000        
Treasury Stock, Shares at Apr. 30, 2018       (3,062,000)    
Stockholders' Equity, Balance at Apr. 30, 2018 2,523 $ 2 1,837 $ (102) 1,205 (419)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Adjustment due to adoption of new accounting standards $ 76       76  
Common Stock, Shares, Outstanding at Oct. 31, 2018   191,204,000        
Treasury Stock, Shares at Oct. 31, 2018 4,400,000     (4,364,000)    
Stockholders' Equity, Balance at Oct. 31, 2018 $ 2,433 $ 2 1,889 $ (182) 1,212 (488)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock (shares)   2,013,000        
Issuance of common stock ($) 15   15      
Share-based compensation 50   50      
Net Income 267       267  
Other Comprehensive Income (Loss), Net of Tax $ 27         27
Treasury Stock, Shares, Acquired (1,030,120)     (1,030,000)    
Treasury Stock, Value, Acquired, Cost Method $ (70)     $ (70)    
Common Stock, Shares, Outstanding at Apr. 30, 2019   193,217,000        
Treasury Stock, Shares at Apr. 30, 2019 5,400,000     (5,394,000)    
Stockholders' Equity, Balance at Apr. 30, 2019 $ 2,798 $ 2 1,954 $ (252) 1,555 (461)
Common Stock, Shares, Outstanding at Jan. 31, 2019   192,801,000        
Treasury Stock, Shares at Jan. 31, 2019       (5,050,000)    
Stockholders' Equity, Balance at Jan. 31, 2019 2,658 $ 2 1,925 $ (222) 1,402 (449)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock (shares)   416,000        
Issuance of common stock ($) 7   7      
Share-based compensation 22   22      
Net Income 153       153  
Other Comprehensive Income (Loss), Net of Tax (12)         (12)
Treasury Stock, Shares, Acquired       (344,000)    
Treasury Stock, Value, Acquired, Cost Method $ (30)     $ (30)    
Common Stock, Shares, Outstanding at Apr. 30, 2019   193,217,000        
Treasury Stock, Shares at Apr. 30, 2019 5,400,000     (5,394,000)    
Stockholders' Equity, Balance at Apr. 30, 2019 $ 2,798 $ 2 $ 1,954 $ (252) $ 1,555 $ (461)