STOCKHOLDER"S EQUITY - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
May. 18, 2016 |
Apr. 30, 2016 |
Apr. 30, 2015 |
Apr. 30, 2016 |
Apr. 30, 2015 |
|
| Dividends Paid | |||||
| Aggregate amount of cash dividends paid | $ 37 | $ 33 | $ 75 | $ 67 | |
| Cash dividends paid per common share | $ 0.115 | $ 0.100 | $ 0.230 | $ 0.200 | |
| Dividends Declared | |||||
| Subsequent Events [Abstract] | |||||
| Declaration date | May 18, 2016 | ||||
| Cash dividends declared per common share | $ 0.115 | ||||
| Aggregate amount of dividends declared | $ 37 | ||||
| Payment date | Jul. 27, 2016 | ||||
| Date of record | Jul. 05, 2016 | ||||