Commitments and Contingencies (Details)
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1 Months Ended |
3 Months Ended |
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Jun. 30, 2018
entity
mi
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Mar. 31, 2016
USD ($)
company
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Mar. 13, 2013
company
mi
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Sep. 30, 2017
company
mi
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Sep. 30, 2016
mi
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Mar. 31, 2016
USD ($)
mi
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Mar. 31, 2020
USD ($)
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Mar. 31, 2019
USD ($)
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Feb. 29, 2020
company
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Dec. 31, 2019
USD ($)
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| Schedule of Equity Method Investments [Line Items] |
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| Accrued probable future environmental expenditures |
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$ 109,700,000
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$ 112,000,000.0
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| Expense related to environmental activities |
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300,000
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$ 2,100,000
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| Insurance recoveries |
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200,000
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$ 0
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| Contamination of Passaic River Study Area |
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| Schedule of Equity Method Investments [Line Items] |
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| Loss Contingency, number of third-party companies assuming responsibility for development of RIFS | company |
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70
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| Calvert City |
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| Schedule of Equity Method Investments [Line Items] |
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| Number of companies negotiating Consent Decree | company |
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3
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| Accrued probable future environmental expenditures |
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$ 99,600,000
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| Lower Passaic River | Contamination of Passaic River Study Area |
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| Schedule of Equity Method Investments [Line Items] |
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| Length of portion of river | mi |
8
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17
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8
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8
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8
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| Total estimated cost of remedy |
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$ 1,400,000,000
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$ 1,400,000,000
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| Number of companies receiving notice of potential liability | company |
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100
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| Number of companies receiving notice of process to allocate remedial costs | company |
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80
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| Number of entities named in suit | entity |
100
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