Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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RESERVE FOR LOSSES AND LOSS EXPENSES - Narrative (Details)	Aug. 05, 2019	Aug. 04, 2019	Mar. 20, 2017	Mar. 19, 2017
Motor Reserve Class \| Reinsurance
Claims Development [Line Items]
Discount rate (percent)	0.25%	0.75%	0.75%	(2.50%)