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Business Segment Information (Schedule of Long-Lived Asset by Geographic Area) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Long-Lived Assets $ 2,658.9us-gaap_NoncurrentAssets $ 2,788.4us-gaap_NoncurrentAssets
UNITED STATES    
Long-Lived Assets 2,121.2us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US		 2,216.8us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
Non-U.S. [Member]    
Long-Lived Assets $ 537.7us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= ir_NonUSMember		 $ 571.6us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= ir_NonUSMember