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Litigation and Contingencies (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018 | Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract] |  |  |
Average paid claim reduction due to curtailments (as a percent) | 4.70% | 5.80% |
Probable loss contingency accrual |  |  | $ 23.5
Maximum exposure associated with other discussions and legal proceedings | $ 289.0 |  |

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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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