| Description of the movement from beginning to ending balance of an accrued obligation to policy and contract holders that relates to insured events, and can be viewed as either (a) the estimated present value of future benefits to be paid to or on behalf of policyholders and expenses less the present value of future net premiums payable under the insurance contracts or (b) the accumulated amount of net premiums already collected less the accumulated amount of benefits and expenses already paid to or on behalf of policyholders. The liability is increased by additional assumed liabilities, increased or decreased by adjustments to reserves and decreased by benefits paid and contract terminations. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |