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Casualty, Environmental and Other Reserves - Narrative (Details) | Jun. 01, 2018 USD ($) | May 31, 2018 USD ($) | Jun. 30, 2019 USD ($) claim site | Dec. 31, 2018 USD ($)
--- | --- | --- | --- | ---
All Contingencies Reserves [Line Items] |  |  |  |
Total reserves |  |  | $ 309,000,000 | $ 324,000,000
Casualty |  |  |  |
All Contingencies Reserves [Line Items] |  |  |  |
Total reserves |  |  | $ 188,000,000 | 199,000,000
Self-insured retention amount, per occurrence | $ 75,000,000 | $ 50,000,000 |  |
Number of individual claims expected to exceed self insured retention amount | claim |  |  | 0 |
Environmental |  |  |  |
All Contingencies Reserves [Line Items] |  |  |  |
Total reserves |  |  | $ 78,000,000 | 80,000,000
Environmental impaired sites | site |  |  | 229 |
Other |  |  |  |
All Contingencies Reserves [Line Items] |  |  |  |
Total reserves |  |  | $ 43,000,000 | $ 45,000,000

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- Definition Number of environmentally impaired sites at which the Company has been identified as a potentially responsible party. + References No definition available. + Details
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- Definition Amount of loss contingency liability. + 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=118942415&loc=d3e14326-108349 + Details
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- Details
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