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Guarantees and Contingent Liabilities (Details) |  |  | 1 Months Ended | 3 Months Ended | 28 Months Ended
--- | --- | --- | --- | --- | ---
Apr. 11, 2018 plaintiff | Jan. 30, 2018 judgment plaintiff | Mar. 31, 2018 plaintiff | Mar. 31, 2018 USD ($) | Dec. 31, 2003 case
Proceedings: |  |  |  |  |
Number of class action cases | case |  |  |  |  | 3
Loss contingency, number of summary judgments | judgment |  | 2 |  |  |
Minimum |  |  |  |  |
Proceedings: |  |  |  |  |
Loss contingencies, reasonably possible pretax loss exposure in excess of the amount accrued | $ |  |  |  | $ 0 |
Maximum |  |  |  |  |
Proceedings: |  |  |  |  |
Loss contingencies, reasonably possible pretax loss exposure in excess of the amount accrued | $ |  |  |  | $ 150,000,000 |
Judicial Ruling |  |  |  |  |
Proceedings: |  |  |  |  |
Loss contingency, number of plaintiffs |  | 27 |  |  |
Settled Litigation |  |  |  |  |
Proceedings: |  |  |  |  |
Loss contingency, number of plaintiffs |  |  | 457 |  |
Pending Litigation |  |  |  |  |
Proceedings: |  |  |  |  |
Loss contingency, number of plaintiffs |  |  | 36 |  |
Subsequent Event | Pending Litigation |  |  |  |  |
Proceedings: |  |  |  |  |
Loss contingency, number of plaintiffs | 14 |  |  |  |

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- Definition The total number of new claims filed pertaining to a loss contingency during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 + Details
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