Annual report pursuant to Section 13 and 15(d)

INVESTMENTS (Details 3)

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INVESTMENTS (Details 3) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]      
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost $ 701    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value 720    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost 1,236    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value 1,237    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost 90    
Available-for-sale securities, after 5 years through 10 years, fair value 103    
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost 200    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value 205    
Available-for-sale Securities, Amortized Cost Basis 2,227    
Debt Securities 2,303 $ 3,328  
Debt Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Proceeds from Sale of Available-for-sale Securities 1,559 3,956 $ 13,710
Gross realized gains 20 39 22
Gross realized losses 13 8 $ 27
Trading Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities 38 47  
Available-for-Sale Securities      
Debt Securities, Available-for-sale [Line Items]      
Solvency Funds of Insurance Captive 1,389 1,266  
Debt Securities 2,265 3,281  
Cash and cash equivalents | Trading Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities 0 0  
Cash and cash equivalents | Available-for-Sale Securities      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities 0 123  
Marketable Securities [Member] | Trading Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities 38 47  
Marketable Securities [Member] | Available-for-Sale Securities      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities 1,980 2,852  
Other assets | Trading Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities 0 0  
Other assets | Available-for-Sale Securities      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities $ 285 $ 306