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Commitments and Contingencies - Asbestos Insurance Coverage (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Supplementary Insurance Information [Line Items]  
Insurance Policy Coverage $ 248.4rxn_InsurancePolicyCoverage
Layer 1  
Supplementary Insurance Information [Line Items]  
Insurance Policy Coverage $ 172.4rxn_InsurancePolicyCoverage
/ rxn_CoverageLayersAxis
= rxn_Layer1Member