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v3.22.1

Property, Plant and Equipment - Narrative (Details) $ in Millions | 12 Months Ended
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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

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