FAIR VALUE MEASUREMENTS (Details 5) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jan. 31, 2014	Jul. 31, 2014	Oct. 31, 2014
Assets and Liabilities Measured at Fair Value on Recurring and Nonrecurring Basis
Losses, Property and equipment - net		$ 62.3
Fair Value, Nonrecurring Measurements | Level 3
Assets and Liabilities Measured at Fair Value on Recurring and Nonrecurring Basis
Property and equipment - net			$ 53.0
Losses, Property and equipment - net		26.0
Losses, Assets held for sale - Water operations		$ 36.0
Other assets			$ 15.0
Fair Value, Nonrecurring Measurements | Level 3 | Water Operations | Cost of Sales
Assets and Liabilities Measured at Fair Value on Recurring and Nonrecurring Basis
Non-cash charge for impairment of long-lived assets, pretax	$ 26.0
Non-cash charge for impairment of long-lived assets, after-tax	$ 26.0