DEBT LONG TERM DEBT - UNAMORTIZED COSTS (Details) - USD ($) $ in Millions |
Apr. 30, 2017 |
Oct. 31, 2016 |
|---|---|---|
| Senior Notes 2019 [Member] | ||
| Debt Instrument [Line Items] | ||
| Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net | $ 2 | $ 3 |
| Senior Notes 2024 [Member] | ||
| Debt Instrument [Line Items] | ||
| Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net | 4 | 4 |
| Senior Notes 2027 [Member] | ||
| Debt Instrument [Line Items] | ||
| Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net | 7 | 0 |
| Term Loan [Member] | ||
| Debt Instrument [Line Items] | ||
| Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net | $ 1 | $ 0 |