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Other Deductions, Net (Schedule Of Other Deductions, Net) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Other deductions, net [Line Items]    
Amortization of intangibles $ 55emr_AmortizationOfIntangiblesIntellectualPropertyAndCustomerRelationships $ 57emr_AmortizationOfIntangiblesIntellectualPropertyAndCustomerRelationships
Rationalization of operations 9us-gaap_RestructuringCharges 13us-gaap_RestructuringCharges
Other 0us-gaap_OtherNonoperatingIncomeExpense 25us-gaap_OtherNonoperatingIncomeExpense
Total 64emr_OtherDeductionsNet 95emr_OtherDeductionsNet
Change in gain (loss) from foreign currency exchange transactions $ 19emr_ChangeInGainLossFromForeignCurrencyExchangeTransactions