XML 34 R40.htm IDEA: XBRL DOCUMENT v2.4.1.9
Long-term and Short-term Debt (Details Textuals 1) (USD $)
In Millions, unless otherwise specified
 6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Sep. 30, 2014
Issuance of long-term debt      
Net proceeds from debt offering $ 594.3us-gaap_ProceedsFromDebtNetOfIssuanceCosts $ 0us-gaap_ProceedsFromDebtNetOfIssuanceCosts  
Fair value of interest rate swap contracts 0.4us-gaap_InterestRateFairValueHedgeDerivativeAtFairValueNet    
Short-term debt      
Commercial paper borrowings outstanding 0us-gaap_CommercialPaper   325.0us-gaap_CommercialPaper
Weighted average interest rate of commercial paper outstanding     0.17%us-gaap_ShortTermDebtWeightedAverageInterestRate
2.050% notes, payable in March 2020      
Issuance of long-term debt      
Long-term debt issued 300.0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= rok_NotesPayableTwoMember		    
Stated interest rate 2.05%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rok_NotesPayableTwoMember		    
Maturity date Mar. 01, 2020    
Effective floating interest rate 0.715%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= rok_NotesPayableTwoMember		    
2.875% notes, payable in March 2025      
Issuance of long-term debt      
Long-term debt issued 300.0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= rok_NotesPayableThreeMember		    
Stated interest rate 2.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= rok_NotesPayableThreeMember		    
Maturity date Mar. 01, 2025    
Effective floating interest rate 1.125%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= rok_NotesPayableThreeMember		    
Aggregate principal amount of notes issued      
Issuance of long-term debt      
Long-term debt issued $ 600.0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= rok_NotesPayableTwoandThreeTotalMember