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, 2019
Dec. 31, 2018
Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]      
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost $ 1,943    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value 1,982    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost 970    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value 1,022    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost 72    
Available-for-sale securities, after 5 years through 10 years, fair value 84    
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost 187    
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value 193    
Available-for-sale Securities, Amortized Cost Basis 3,172    
Debt Securities 3,328 $ 5,037  
Debt Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Proceeds from Sale of Available-for-sale Securities 3,956 13,710 $ 13,930
Gross realized gains 39 22 7
Gross realized losses 8 27 13
Trading Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities 47 44  
Available-for-Sale Securities      
Debt Securities, Available-for-sale [Line Items]      
Solvency Funds of Insurance Captive 1,266 1,056  
Debt Securities 3,281 4,993  
Proceeds from Sale of Available-for-sale Securities     275
Gross realized gains     61
Gross realized losses     $ 19
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 123 0  
Marketable Securities [Member] | Trading Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities 47 44  
Marketable Securities [Member] | Available-for-Sale Securities      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities 2,852 4,691  
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 $ 306 $ 302