Property, Plant and Equipment - Summary of Impairment Charges (Details) - USD ($) $ in Millions |
12 Months Ended | ||
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Mar. 31, 2020 |
Mar. 31, 2019 |
Mar. 31, 2018 |
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Impaired Long-Lived Assets Held and Used [Line Items] | |||
Impairment of Property, Plant & Equipment | $ 64.5 | $ 9.1 | $ 0.7 |
North America Fiber Cement | |||
Impaired Long-Lived Assets Held and Used [Line Items] | |||
Impairment of Property, Plant & Equipment | 44.0 | 3.0 | 0.7 |
Asia Pacific Fiber Cement | |||
Impaired Long-Lived Assets Held and Used [Line Items] | |||
Impairment of Property, Plant & Equipment | 15.0 | 0.0 | 0.0 |
Europe Building Products | |||
Impaired Long-Lived Assets Held and Used [Line Items] | |||
Impairment of Property, Plant & Equipment | 5.5 | 0.0 | 0.0 |
Other Businesses | |||
Impaired Long-Lived Assets Held and Used [Line Items] | |||
Impairment of Property, Plant & Equipment | $ 0.0 | $ 6.1 | $ 0.0 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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