v3.24.1.1.u2
Acquisitions and Dispositions, Acquisition of Scott Springfield Mfg. Inc. (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Mar. 31, 2022
Mar. 01, 2024
Acquisition of Scott Springfield Mfg. Inc. [Abstract]              
Business acquisition, net of cash acquired     $ 186.2   $ 0.0 $ 0.0  
Allocation of Purchase Price [Abstract]              
Goodwill $ 230.9   230.9   165.6 $ 168.1  
Scott Springfield Manufacturing [Member]              
Acquisition of Scott Springfield Mfg. Inc. [Abstract]              
Consideration transferred, net of cash acquired             $ 183.8
Business acquisition, net of cash acquired     181.4        
Remaining payable for business acquisition 2.4   $ 2.4        
Net sales prior to acquisition       $ 110.0      
Period net sales are included in consolidated statement of operations     1 month        
Net sales since date of acquisition 7.9            
Allocation of Purchase Price [Abstract]              
Cash and cash equivalents             0.3
Trade accounts receivable             27.5
Inventories             20.9
Property, plant and equipment             6.0
Intangible assets 102.3   $ 102.3       102.3
Goodwill             65.2
Other assets             4.0
Accounts payable             (8.6)
Accrued compensation and employee benefits             (1.3)
Deferred income taxes             (24.4)
Other liabilities             (7.8)
Purchase price             184.1
Write-up of acquired inventory             $ 3.2
Unaudited Supplemental Pro Forma Information [Abstract]              
Net sales     2,507.5   2,346.2    
Net earnings attributable to Modine     164.3   126.3    
Pro forma adjustment for annual amortization and depreciation expense     9.0   20.0    
Pro forma adjustment for estimated annual interest expense     6.0   6.0    
Pro forma adjustment for acquisition-related transaction costs         2.0    
Pro forma adjustment for inventory purchase accounting adjustments         $ 3.2    
Scott Springfield Manufacturing [Member] | Customer Relationships [Member]              
Allocation of Purchase Price [Abstract]              
Intangible assets 66.9   $ 66.9        
Weighted-average useful life of acquired intangible assets     12 years        
Scott Springfield Manufacturing [Member] | Order Backlog [Member]              
Allocation of Purchase Price [Abstract]              
Intangible assets 22.6   $ 22.6        
Weighted-average useful life of acquired intangible assets     1 year        
Scott Springfield Manufacturing [Member] | Trade Names [Member]              
Allocation of Purchase Price [Abstract]              
Intangible assets 12.8   $ 12.8        
Weighted-average useful life of acquired intangible assets     10 years        
Scott Springfield Manufacturing [Member] | SG&A Expenses [Member]              
Acquisition of Scott Springfield Mfg. Inc. [Abstract]              
Costs related to acquisition 2.1   $ 2.1        
Scott Springfield Manufacturing [Member] | Cost of Sales [Member]              
Allocation of Purchase Price [Abstract]              
Fair value write-up adjustment to acquired inventory $ 1.6            
Scott Springfield Manufacturing [Member] | Cost of Sales [Member] | Plan [Member]              
Allocation of Purchase Price [Abstract]              
Fair value write-up adjustment to acquired inventory   $ 1.6