Quarterly report pursuant to Section 13 or 15(d)

Financing Agreements - Narrative (Details)

v3.20.1
Financing Agreements - Narrative (Details)
€ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
USD ($)
Mar. 31, 2019
Mar. 31, 2020
USD ($)
Rate
Mar. 31, 2019
Sep. 30, 2019
USD ($)
Mar. 31, 2020
EUR (€)
Jan. 10, 2020
EUR (€)
Debt instrument [Line Items]                      
Debt Instrument, Covenant Holiday, Maximum Ratio of Indebtedness to Earnings before Interest, Taxes, Depreciation, and Amortization                 4.0    
Debt Issuance Costs, Line of Credit Arrangements, Gross         $ 2,000,000.0   $ 2,000,000.0        
Long-term Debt         1,873,300,000   1,873,300,000   $ 619,500,000    
Maximum ratio of Indebtedness to EBITDA allowed                 3.5    
LeverageHolidayBusinessAcquisition                 75,000,000.0    
Debt Instrument, Covenant Terms, Minimum Ratio of Earnings before Interest, Taxes, Depreciation, and Amortization to Interest Expense                 3.0    
HI_500TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Issuance Costs, Line of Credit Arrangements, Gross         1,500,000   1,500,000        
Debt instrument, face amount         500,000,000.0   500,000,000.0        
Long-term Debt         $ 492,300,000   $ 492,300,000   $ 0    
Weighted average interest rates         3.36%   3.40%        
HI_225TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Issuance Costs, Line of Credit Arrangements, Gross         $ 400,000   $ 400,000        
Debt instrument, face amount         225,000,000.0   225,000,000.0        
Long-term Debt         $ 221,800,000   $ 221,800,000   0    
Weighted average interest rates         3.23%   3.27%        
$900.0 revolving credit facility (excluding outstanding letters of credit)                      
Debt instrument [Line Items]                      
Line of credit facility, maximum borrowing capacity         $ 159,700,000   $ 159,700,000        
Long-term Debt         537,600,000   537,600,000   0    
Letters of Credit Outstanding, Amount         8,300,000   8,300,000        
Line of credit facility, remaining borrowing capacity         $ 354,100,000   $ 354,100,000        
Weighted average interest rates         2.84% 2.73% 2.88% 2.57%      
Weighted average facility fee         0.25% 0.12% 0.21% 0.11%      
$150.0 senior unsecured notes, net of discount (4)                      
Debt instrument [Line Items]                      
Debt Issuance Costs, Line of Credit Arrangements, Gross         $ 4,000,000.0   $ 4,000,000.0   4,300,000    
Debt instrument, face amount         375,000,000.0   375,000,000.0        
Long-term Debt         370,400,000   370,400,000   370,100,000    
$150 senior unsecured notes [Member]                      
Debt instrument [Line Items]                      
Debt Issuance Costs, Line of Credit Arrangements, Gross         100,000   100,000   200,000    
Debt instrument, face amount         150,000,000.0   150,000,000.0        
Long-term Debt         149,900,000   149,900,000   149,700,000    
$100.0 Series A Notes (5)                      
Debt instrument [Line Items]                      
Debt Issuance Costs, Line of Credit Arrangements, Gross         300,000   300,000        
Long-term Debt         99,700,000   99,700,000   $ 99,700,000    
Other Financing Agreements                      
Debt instrument [Line Items]                      
Line of credit facility, maximum borrowing capacity         379,700,000   379,700,000        
Line of credit facility, amount utilized for bank guarantees         277,000,000.0   $ 277,000,000.0        
Syndicated credit facility                      
Debt instrument [Line Items]                      
Line of credit facility, maximum borrowing capacity | €                   € 150.0  
L/G Facility Agreement Amendment                      
Debt instrument [Line Items]                      
Line of credit facility, increase in maximum borrowing capacity | €                     € 25.0
Amendment Of Credit Agreement, L/G Facility Agreement And The Shelf Agreement [Member]                      
Debt instrument [Line Items]                      
Maximum ratio of Indebtedness to EBITDA allowed             4.50        
Debt Instrument, Redemption, Period One [Member] | HI_500TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Instrument, Periodic Payment, Principal             $ 0.05        
Debt Instrument, Redemption, Period One [Member] | HI_225TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Instrument, Periodic Payment, Principal             0.05        
Debt Instrument, Redemption, Period Three [Member] | HI_500TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Instrument, Periodic Payment, Principal             0.075        
Debt Instrument, Redemption, Period Three [Member] | HI_225TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Instrument, Periodic Payment, Principal             0.075        
Debt Instrument, Redemption, Period Five [Member] | HI_500TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Instrument, Periodic Payment, Principal             $ 0.10        
Base Rate [Member] | Minimum | HI_500TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate | Rate             0.00%        
Base Rate [Member] | Minimum | HI_225TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate | Rate             0.00%        
Base Rate [Member] | Maximum | HI_500TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate | Rate             0.875%        
Base Rate [Member] | Maximum | HI_225TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate | Rate             0.75%        
LIBO Rate [Member] | Minimum | HI_500TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate | Rate             1.00%        
LIBO Rate [Member] | Minimum | HI_225TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate | Rate             0.875%        
LIBO Rate [Member] | Maximum | HI_500TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate | Rate             1.875%        
LIBO Rate [Member] | Maximum | HI_225TermLoan [Member]                      
Debt instrument [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate | Rate             1.75%        
Milacron | Revolver [Member] | $900.0 revolving credit facility (excluding outstanding letters of credit)                      
Debt instrument [Line Items]                      
Long-term Line of Credit         $ 650,000,000.0   $ 650,000,000.0        
Forecast [Member] | Amendment Of Credit Agreement, L/G Facility Agreement And The Shelf Agreement [Member]                      
Debt instrument [Line Items]                      
Maximum ratio of Indebtedness to EBITDA allowed 3.50 3.75 4.00 4.25