Quarterly report pursuant to Section 13 or 15(d)

Other Income (Expense), Net (Details)

v2.4.1.9
Other Income (Expense), Net (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Accumulated other comprehensive income (loss) [Line Items]        
Equity in net income (loss) of affiliates $ (1.7)us-gaap_IncomeLossFromEquityMethodInvestments $ 2.9us-gaap_IncomeLossFromEquityMethodInvestments $ (1.4)us-gaap_IncomeLossFromEquityMethodInvestments $ 2.7us-gaap_IncomeLossFromEquityMethodInvestments
Foreign currency exchange loss, net (3.3)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax (0.4)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax (4.1)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax (0.7)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Gain on exercise of warrants 0hi_GainLossOnExerciseOfWarrants 5.2hi_GainLossOnExerciseOfWarrants 0hi_GainLossOnExerciseOfWarrants 5.2hi_GainLossOnExerciseOfWarrants
Service agreement cancellation 0hi_GainRelatedToServiceAgreementCancellation 2.5hi_GainRelatedToServiceAgreementCancellation 0hi_GainRelatedToServiceAgreementCancellation 2.5hi_GainRelatedToServiceAgreementCancellation
Other, net 0hi_OtherNonoperatingIncomeExpenseNet (0.5)hi_OtherNonoperatingIncomeExpenseNet 0.5hi_OtherNonoperatingIncomeExpenseNet (0.1)hi_OtherNonoperatingIncomeExpenseNet
Other income and (expense), net (5.0)us-gaap_OtherNonoperatingIncomeExpense 9.7us-gaap_OtherNonoperatingIncomeExpense (5.0)us-gaap_OtherNonoperatingIncomeExpense 9.6us-gaap_OtherNonoperatingIncomeExpense
Proceeds from warrant exercise       5.7us-gaap_ProceedsFromWarrantExercises
Forethought Financial Group, Inc        
Accumulated other comprehensive income (loss) [Line Items]        
Gain on exercise of warrants     5.2hi_GainLossOnExerciseOfWarrants
/ us-gaap_StatementBusinessSegmentsAxis
= hi_ForethoughtFinancialGroupIncMember
 
Proceeds from warrant exercise     6.2us-gaap_ProceedsFromWarrantExercises
/ us-gaap_StatementBusinessSegmentsAxis
= hi_ForethoughtFinancialGroupIncMember
 
Batesville        
Accumulated other comprehensive income (loss) [Line Items]        
Service agreement cancellation   $ 2.5hi_GainRelatedToServiceAgreementCancellation
/ us-gaap_StatementBusinessSegmentsAxis
= hi_BatesvilleSegmentMember