Note 13 - Per Share Calculations (Details Textual) - shares shares in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Exchangeable Note Unit Rate Stated Percentage	6.00%
Non Vested Stock and Outstanding Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		2.7	4.4
Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0.8	10.0	14.6
Out of the Money Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	5.4	4.6	7.3