Property, Plant and Equipment Property, plant and equipment useful life (Details)	12 Months Ended
	Oct. 31, 2014
Minimum [Member] | Building and Building Improvements [Member]
Useful lives [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	10
Minimum [Member] | Machinery and Equipment [Member]
Useful lives [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	3
Minimum [Member] | Furniture and Fixtures [Member]
Useful lives [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	10
Minimum [Member] | Power plants for use under PPA's [Member]
Useful lives [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	3
Maximum [Member] | Building and Building Improvements [Member]
Useful lives [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	26
Maximum [Member] | Machinery and Equipment [Member]
Useful lives [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	8
Maximum [Member] | Furniture and Fixtures [Member]
Useful lives [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	10
Maximum [Member] | Power plants for use under PPA's [Member]
Useful lives [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	10