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LONG-TERM DEBT - Carrying Value (Details) - USD ($)
$ in Millions
Oct. 31, 2019
Oct. 31, 2018
Feb. 01, 2016
Debt Instrument [Line Items]      
Debt Instrument Net Discount Premium Amount $ 1,786 $ 1,792  
Interest Rate Swap 0 7 $ 300
Long-term Debt, Gross 1,786 1,799  
Senior Notes 2020 [Member]      
Debt Instrument [Line Items]      
Debt Instrument Net Discount Premium Amount   499  
Interest Rate Swap   7  
Long-term Debt, Gross   506  
Senior Notes 2022 [Member]      
Debt Instrument [Line Items]      
Debt Instrument Net Discount Premium Amount 399 399  
Interest Rate Swap 0 0  
Long-term Debt, Gross 399 399  
Senior Notes 2023 [Member]      
Debt Instrument [Line Items]      
Debt Instrument Net Discount Premium Amount 597 597  
Interest Rate Swap 0 0  
Long-term Debt, Gross 597 597  
Senior Notes 2026 [Member]      
Debt Instrument [Line Items]      
Debt Instrument Net Discount Premium Amount 298 297  
Interest Rate Swap 0 0  
Long-term Debt, Gross 298 297  
Senior Notes 2029 [Member]      
Debt Instrument [Line Items]      
Debt Instrument Net Discount Premium Amount 492 0  
Interest Rate Swap 0 0  
Long-term Debt, Gross $ 492 $ 0