| **General (Narrative) (Details)**                                                | 6 Months Ended                               |
|----------------------------------------------------------------------------------|----------------------------------------------|
||
| **New Accounting Pronouncements or Change in Accounting Principle [Line Items]** |                                         |
| Accounting Standards Update [Extensible Enumeration]                             | Accounting Standards Update 2018-12 [Member] |
| CNAF Consolidated | Loews                                                        |                                         |
| **New Accounting Pronouncements or Change in Accounting Principle [Line Items]** |                                         |
| Noncontrolling interest, ownership percentage by parent                          | 90.00%                                       |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      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| - Definition
Indicates amendment to accounting standards.
+ References
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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.
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No definition available.
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