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CAPITALIZATION OF SOFTWARE DEVELOPMENT COSTS (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Dec. 27, 2014
Dec. 28, 2013
Mar. 29, 2014
Research and Development [Abstract]      
Capitalized software development costs for ongoing initiatives $ (6.6)us-gaap_ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost $ 3.4us-gaap_ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost  
Software costs capitalized, net 38.3us-gaap_CapitalizedComputerSoftwareNet   31.7us-gaap_CapitalizedComputerSoftwareNet
Total costs capitalized related to in process software development initiatives 8.9us-gaap_CapitalizedSoftwareDevelopmentCostsForSoftwareSoldToCustomers   15.6us-gaap_CapitalizedSoftwareDevelopmentCostsForSoftwareSoldToCustomers
Capitalized software development costs placed into service $ 12.9hae_CapitalizedSoftwareDevelopmentCostsPlacedintoService