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Commitments and Contingencies - Changes in Accrued Environmental Remediation and Related Costs (Detail) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018
Environmental Remediation Obligations [Abstract] |  |  |
Balance at the beginning of the year | $ 103.4 |  |
Additions charged (credited) to expense, net | (0.7) |  |
Payments, net | (0.8) |  |
Other, net | 0.6 |  |
Balance at the end of period | 102.5 |  |
Amounts recognized in our Condensed Consolidated Balance Sheet at the end of the period: |  |  |
Current liabilities |  | $ 6.4 | $ 6.5
Noncurrent liabilities |  | 96.1 | 96.9
Total | $ 103.4 | $ 102.5 | $ 103.4

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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 + Details
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