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DISPOSITION - WATER OPERATIONS (Details) (Water Operations, USD $)
In Millions, unless otherwise specified
 3 Months Ended
Apr. 30, 2014
Water Operations
  
Dispositions  
Non-cash charge in other operating expenses for an impairment to write-down assets held for sale to realizable value, pretax $ 36
Non-cash charge in other operating expenses for an impairment to write-down assets held for sale to realizable value, after-tax 4
Major Classes of Assets and Liabilities of the Water Operations  
Trade accounts and notes receivable - net 57
Other receivables 10
Inventories 49
Other assets 5
Asset impairment (36)
Total assets 85
Accounts payable and accrued expenses 47
Retirement benefits and other liabilities 3
Total liabilities $ 50