Intangible Assets (Schedule of Other Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 30, 2018	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		$ 2,021,000	$ 878,000
Accumulated Amortization & Translation		$ 499,700	373,300
Weighted Average Amortization Period		14 years
Other intangible assets, net		$ 1,521,300	504,700
Impairment of intangibles	$ 24,400	24,400	0	$ 0
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		139,200	44,500
Accumulated Amortization & Translation		$ 16,900	10,300
Weighted Average Amortization Period		14 years
Composite [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		$ 1,061,900	0
Accumulated Amortization & Translation		$ 70,800	0
Weighted Average Amortization Period		15 years
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		$ 395,000	428,800
Accumulated Amortization & Translation		$ 190,700	173,200
Weighted Average Amortization Period		11 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		$ 350,000	335,500
Accumulated Amortization & Translation		$ 168,600	145,300
Weighted Average Amortization Period		13 years
License And Distribution Rights And Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount		$ 74,900	69,200
Accumulated Amortization & Translation		$ 52,700	$ 44,500
Weighted Average Amortization Period		9 years