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DERIVATIVES- Text (Details)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 05, 2021
USD ($)
Jan. 21, 2021
USD ($)
Sep. 06, 2019
USD ($)
Sep. 15, 2016
USD ($)
Apr. 30, 2021
USD ($)
Apr. 30, 2020
USD ($)
Apr. 30, 2021
USD ($)
Apr. 30, 2020
USD ($)
Aug. 16, 2019
USD ($)
Feb. 01, 2016
USD ($)
contracts
Sep. 13, 2012
USD ($)
Jul. 01, 2012
USD ($)
Derivative Instruments and Hedging Activities Disclosure                        
Aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a net liability position         $ 15   $ 15          
Senior Notes 2022                        
Terminated Derivative Contracts                        
Repayments of Senior Debt $ 300 $ 100                    
Aggregate face amount of debt                     $ 400  
Senior Notes 2022 | Treasury Lock [Member] | Derivatives Designated as Hedging Instrument | Cash Flow Hedging                        
Terminated Derivative Contracts                        
Derivative, Notional Amount                       $ 400
Senior Notes 2026 | Interest Rate Swap | Derivatives Designated as Hedging Instrument | Cash Flow Hedging                        
Terminated Derivative Contracts                        
Number of interest rate swap contracts terminated | contracts                   3    
Derivative, Notional Amount                   $ 300    
Interest rate swap payments       $ 10                
Remaining gain (loss) to be amortized on derivative         5   5          
Senior Notes 2029 | Treasury Lock [Member] | Derivatives Designated as Hedging Instrument | Cash Flow Hedging                        
Terminated Derivative Contracts                        
Derivative, Notional Amount                 $ 250      
Interest rate swap payments     $ 6                  
Remaining gain (loss) to be amortized on derivative         5   5          
Accumulated Other Comprehensive Income (Loss) | Foreign Exchange Contracts | Derivatives Designated as Hedging Instrument | Cash Flow Hedging                        
Net Investment Hedge                        
Gain (loss) recognized in accumulated other comprehensive loss         0 $ 2 (6) $ 3        
Accumulated Other Comprehensive Income (Loss) | Foreign Exchange Contracts | Derivatives Designated as Hedging Instrument | Net Investment Hedging [Member]                        
Net Investment Hedge                        
Gain (loss) recognized in accumulated other comprehensive loss         $ 1 $ 1 $ (3) $ 1