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INSURANCE LIABILITIES (Details - Liability for Unpaid Losses and Loss Adjustment Expenses) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Supplementary Insurance Information, by Segment [Line Items]                      
Gross loss reserves before reinsurance and discount, net of contractual deductible recoverable amounts due from policyholders $ 12,200       $ 12,300       $ 12,200 $ 12,300  
Collateral Held For Deductible Recoverable Amounts 8,900       9,200       8,900 9,200  
Reconciliation of activity in the Liability for unpaid claims and claims adjustment expense:                      
Liability for unpaid loss and loss adjustment expenses, beginning of year       $ 83,639       $ 78,393 83,639 78,393 $ 77,077
Reinsurance recoverable, balance at the beginning of the year       (31,690)       (26,708) (31,690) (26,708) (15,532)
Net Liability for unpaid loss and loss adjustment expenses, beginning of year       51,949       51,685 51,949 51,685 61,545
Losses and loss adjustment expenses incurred                      
Current year                 17,596 20,534 21,079
Prior years, other than accretion of discount (119) $ (74) $ (132) $ (15) 546 $ 949 $ (26) $ (40)      
Prior years, excluding discount and amortization of deferred gain                 (340) 1,429 1,565
Prior years, discount charge (benefit)                 1,063 (252) 187
Prior years, amortization of deferred gain on retroactive reinsurance                 (219) (395) (284)
Total losses and loss adjustment expenses incurred                 18,100 21,316 22,547
Losses and loss adjustment expenses paid                      
Current year                 (4,894) (5,754) (5,323)
Prior years                 (18,020) (17,768) (16,241)
Total losses and loss adjustment expenses paid                 (22,914) (23,522) (21,564)
Other changes                      
Foreign exchange effect                 (6) (677) 788
Acquisitions                 0 3,284 23
Dispositions                 0 0 (360)
Retroactive reinsurance adjustment (net of discount)                 130 (137) (11,294)
Total other changes                 124 2,470 (10,843)
Net liability for unpaid losses and loss adjustment expenses, balance at end of year 47,259       51,949       47,259 51,949 51,685
Reinsurance recoverable, balance at the end of the year 31,069       31,690       31,069 31,690 26,708
Total, balance at the end of the year $ 78,328       $ 83,639       78,328 83,639 78,393
Change in discount on loss reserves ceded under retroactive reinsurance                 469 (180) (1,539)
U.S. Asbestos | NICO                      
Losses and loss adjustment expenses incurred                      
Prior years, discount charge (benefit)                 27 51 25
U.S. Commercial long-tail exposures                      
Losses and loss adjustment expenses incurred                      
Prior years, other than accretion of discount                 (4) $ (4) $ (30)
Prior years, excluding discount and amortization of deferred gain                 $ 22