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Debt - Schedule of Debt Instruments (Details) - USD ($)
$ in Millions
Apr. 30, 2019
Jan. 31, 2019
Nov. 01, 2018
Oct. 31, 2018
Debt Instrument [Line Items]        
Long-term Debt and Capital Lease Obligations $ 4,588 $ 4,588 $ 4,463 $ 4,521
Term Loan [Member]        
Debt Instrument [Line Items]        
Gross maximum borrowing capacity 392     394
Financial Services Operations        
Debt Instrument [Line Items]        
Long-term Debt and Capital Lease Obligations, Including Current Maturities 2,395     2,041
Long-term Debt and Capital Lease Obligations, Current 709     485
Long-term Debt and Capital Lease Obligations 1,686     1,556
Financial Services Operations | Secured Debt [Member]        
Debt Instrument [Line Items]        
Long-term Debt 1,213     948
Financial Services Operations | Line of Credit [Member]        
Debt Instrument [Line Items]        
Long-term Debt 660     519
Financial Services Operations | Commercial Paper [Member]        
Debt Instrument [Line Items]        
Long-term Debt       75
Commercial Paper 47      
Financial Services Operations | Borrowings Secured By Operating and Finance Leases [Member]        
Debt Instrument [Line Items]        
Long-term Debt 83     105
Manufacturing Operations [Member]        
Debt Instrument [Line Items]        
Long-term Debt and Capital Lease Obligations, Including Current Maturities 2,962     3,426
Long-term Debt and Capital Lease Obligations, Current 60     461
Long-term Debt and Capital Lease Obligations 2,902     2,965
Manufacturing Operations [Member] | Line of Credit [Member]        
Debt Instrument [Line Items]        
Long-term Debt $ 1,563     1,570
Manufacturing Operations [Member] | Notes Payable to Banks [Member] | Eight Point Two Five Percent Senior Notes [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 8.25%      
Long-term Debt $ 1,084     1,083
Manufacturing Operations [Member] | Convertible Subordinated Debt [Member] | Four Point Five Zero Senior Subordinated Convertible Notes [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.50%      
Manufacturing Operations [Member] | Convertible Subordinated Debt [Member] | Four Point Seven Five Senior Subordinated Convertible Notes [Member] [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 4.75%      
Long-term Debt $ 0     405
Manufacturing Operations [Member] | Tax Exempt Bond [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage 6.75%      
Long-term Debt $ 220     220
Manufacturing Operations [Member] | Financed lease obligations [Member]        
Debt Instrument [Line Items]        
Long-term Debt 53     122
Manufacturing Operations [Member] | Notes Payable, Other Payables [Member]        
Debt Instrument [Line Items]        
Long-term Debt $ 42     $ 26