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CAPITALIZATION OF SOFTWARE DEVELOPMENT COSTS (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Mar. 30, 2013
Capitalization of Software and Development Costs [Abstract]      
Capitalized software development costs for ongoing initiatives $ 9.5us-gaap_ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost $ 6.0us-gaap_ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost  
Software costs capitalized, net 39.7us-gaap_CapitalizedComputerSoftwareNet 31.7us-gaap_CapitalizedComputerSoftwareNet  
Total costs capitalized related to in process software development initiatives 7.9us-gaap_CapitalizedSoftwareDevelopmentCostsForSoftwareSoldToCustomers 15.6us-gaap_CapitalizedSoftwareDevelopmentCostsForSoftwareSoldToCustomers  
Interest costs capitalized 0.2us-gaap_InterestCostsCapitalized 0.4us-gaap_InterestCostsCapitalized  
Capitalized costs amortized (placed into service) 15.7us-gaap_CapitalizedComputerSoftwareAmortization 10.4us-gaap_CapitalizedComputerSoftwareAmortization  
Amortization of capitalized software development cost expense $ 3.2hae_CapitalizedSoftwareDevelopmentAmortization $ 1.1hae_CapitalizedSoftwareDevelopmentAmortization $ 0.9hae_CapitalizedSoftwareDevelopmentAmortization