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REINSURANCE (Details - Short-Duration Reinsurance) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Premiums earned:        
Net   $ 31,259 $ 28,523 $ 30,561
Short-duration insurance        
Premiums Written        
Direct   30,910 28,521 29,338
Assumed   7,209 5,947 5,808
Ceded   (11,702) (11,012) (9,692)
Net Amount   26,417 23,456 25,454
Premiums earned:        
Direct   30,279 28,596 30,017
Assumed   6,640 5,984 6,395
Ceded   (11,301) (10,435) (9,526)
Net   25,618 24,145 26,886
Reinsurance recoveries, which reduced policyholder benefits and claims incurred   7,200 7,700 4,700
Ceded loss reserves under retroactive agreements   16,800 18,900  
Deferred Gain (Loss) Retroactive Reinsurance   1,300 1,700  
Effect on income from amortization of the deferred gain   191 $ 237 $ 219
Short-duration insurance | NICO        
Premiums earned:        
Transfer of reserve, percent 80.00%      
Ceded losses paid, percent 80.00%      
Short-duration insurance | Maximum | NICO        
Premiums earned:        
Ceded losses paid in excess, net   25,000    
Ceded losses paid aggregate limit, net   $ 25,000