Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Property, Plant and Equipment - Narrative (Details)

v3.22.1
Property, Plant and Equipment - Narrative (Details)
$ in Millions
 12 Months Ended
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
plant
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 155.6 $ 129.6 $ 125.4
Capitalized interest 1.9 9.5  
Restructuring expenses 0.0 0.0 77.4
Property, plant and equipment, net 1,457.0 1,372.3  
Other impairment charges     1.2
Shut Down of Summerville, South Carolina Facility      
Property, Plant and Equipment [Line Items]      
Impairment charges related to decision to shut down facility     12.0
Impairment charge, difference between carrying value and fair value     22.1
Costs to sell     10.1
Non-Core Assets      
Property, Plant and Equipment [Line Items]      
Impairment charges related to decision to shut down facility     $ 29.2
Number of plants | plant     4
North America Fiber Cement      
Property, Plant and Equipment [Line Items]      
Restructuring expenses     $ 41.2
North America Fiber Cement | Cost of Sales      
Property, Plant and Equipment [Line Items]      
Other impairment charges $ 0.4 $ 2.0 2.8
Asia Pacific Fiber Cement | Penrose Plant Assets      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, net     2.6
Asia Pacific Fiber Cement | Exit of Business      
Property, Plant and Equipment [Line Items]      
Restructuring expenses     14.0
Impairment charges related to decision to shut down facility     1.0
Europe Building Products | Non-Core Assets      
Property, Plant and Equipment [Line Items]      
Restructuring expenses     $ 5.5