INCOME TAXES, Rate Reconciliation (Details)	1 Months Ended	2 Months Ended	12 Months Ended
	Jan. 31, 2018	Dec. 21, 2017	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Federal statutory income tax rate	21.00%	35.00%	23.30%	35.00%	35.00%
State taxes, less applicable federal income tax reduction			2.90%	1.90%	1.70%
Discrete net tax benefit related to Tax Act			(3.40%)	0.00%	0.00%
Research and development tax credits			(2.00%)	(1.80%)	(2.70%)
Domestic production activities tax deduction			(0.80%)	(1.10%)	(1.30%)
Tax benefit related to stock option exercises (ASU 2016-09 adoption)			(0.50%)	(1.00%)	0.00%
Noncontrolling interests' share of income			0.30%	0.70%	0.70%
Tax-exempt (gains) losses on corporate-owned life insurance policies			(0.10%)	1.80%	0.10%
Other, net			0.50%	(0.20%)	(0.40%)
Effective tax rate			19.80%	30.30%	31.50%