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FAIR VALUE MEASUREMENTS 2 (Details) - USD ($)
Dec. 31, 2021
Apr. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Long-term investment   $ 577,000,000 $ 0 $ 0
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Short-term investment $ 34,000,000   0  
Long-term receivables 170,000,000   137,000,000  
Long-term investment 366,000,000   0  
Long-term debt and related current maturities 16,057,000,000   18,787,000,000  
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Short-term investment 34,000,000   0  
Long-term receivables 152,000,000   132,000,000  
Long-term investment 366,000,000   0  
Long-term debt and related current maturities $ 17,022,000,000   $ 20,176,000,000