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NEW ACCOUNTING PRONOUNCEMENTS ASU 2017-07 (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cost of Goods and Services Sold $ 1,769 $ 1,767 $ 1,492
Research and Development Expense 688 624 507
Selling, General and Administrative Expense 1,155 1,205 1,058
Other Operating Income (Expense), Net (20) (33) (16)
Other income (expense), net 61 54 104
Previously Reported [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Research and Development Expense   607 498
Selling, General and Administrative Expense   1,185 1,049
Other income (expense), net   6 13
Restatement Adjustment [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Research and Development Expense   17 9
Selling, General and Administrative Expense   20 9
Other Operating Income (Expense), Net   0 (68)
Other income (expense), net   48 91
Products      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cost of Goods and Services Sold $ 1,439 1,449 1,210
Products | Previously Reported [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cost of Goods and Services Sold   1,440 1,206
Other Operating Income (Expense), Net   (33) (84)
Products | Restatement Adjustment [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cost of Goods and Services Sold   9 4
Service [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cost of Goods and Services Sold   318 282
Service [Member] | Previously Reported [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cost of Goods and Services Sold   316 281
Service [Member] | Restatement Adjustment [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Cost of Goods and Services Sold   $ 2 $ 1