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FAIR VALUE MEASUREMENTS (Details 4) (USD $)
In Millions, unless otherwise specified
6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended
Apr. 30, 2014
Apr. 30, 2014
Fair Value, Nonrecurring Measurements
Level 3
Oct. 31, 2013
Fair Value, Nonrecurring Measurements
Level 3
Apr. 30, 2014
Fair Value, Nonrecurring Measurements
Level 3
Water Operations
Apr. 30, 2014
Fair Value, Nonrecurring Measurements
Level 3
Water Operations
Jan. 31, 2014
Fair Value, Nonrecurring Measurements
Level 3
Water Operations
Cost of Sales
Assets and Liabilities Measured at Fair Value on Recurring and Nonrecurring Basis            
Property and equipment - net     $ 36      
Losses, Property and equipment - net   26        
Assets held for sale - Water operations       91 91  
Losses, Assets held for sale - Water operations       36 36  
Asset impairment charges            
Non-cash charge, pretax 62.3         26.0
Non-cash charge, after-tax           $ 26