Quarterly report pursuant to Section 13 or 15(d)

Financing Agreements - Schedule of borrowings (Details)

v3.19.3.a.u2
Financing Agreements - Schedule of borrowings (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Sep. 30, 2019
Debt Instrument [Line Items]    
Debt Issuance Costs, Line of Credit Arrangements, Gross $ 2.0  
Total debt 1,864.7 $ 619.5
Other 6.1 0.0
Current portion of long-term debt 42.1 0.0
Long-term debt 1,822.6 619.5
$900.0 revolving credit facility (excluding outstanding letters of credit)    
Debt Instrument [Line Items]    
Total debt 525.0 0.0
HI_500TermLoan [Member]    
Debt Instrument [Line Items]    
Debt Issuance Costs, Line of Credit Arrangements, Gross 1.5  
Total debt 492.2 0.0
$150.0 senior unsecured notes, net of discount (4)    
Debt Instrument [Line Items]    
Debt Issuance Costs, Line of Credit Arrangements, Gross 4.2 4.3
Total debt 370.2 370.1
HI_225TermLoan [Member]    
Debt Instrument [Line Items]    
Debt Issuance Costs, Line of Credit Arrangements, Gross 0.5  
Total debt 221.7 0.0
$150 senior unsecured notes [Member]    
Debt Instrument [Line Items]    
Debt Issuance Costs, Line of Credit Arrangements, Gross 0.1 0.2
Total debt 149.8 149.7
$100.0 Series A Notes (5)    
Debt Instrument [Line Items]    
Debt Issuance Costs, Line of Credit Arrangements, Gross 0.3 0.3
Total debt $ 99.7 $ 99.7