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DEBT - Narrative (Details)
1 Months Ended
Aug. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]      
Fair value of total debt   $ 5,700,000,000 $ 6,300,000,000
Letters of credit and surety bonds outstanding   458,000,000 $ 519,000,000
Available proceeds under program   $ 300,000,000  
Maximum      
Debt Instrument [Line Items]      
Ratio of debt to consolidated net worth   3  
Global revolving credit facility      
Debt Instrument [Line Items]      
Debt to consolidated tangible net worth ratio   1.65  
Global revolving credit facility | Letter of Credit      
Debt Instrument [Line Items]      
Line of credit remaining capacity   $ 1,200,000,000  
Medium Term Notes due November 15, 2021      
Debt Instrument [Line Items]      
Debt issued $ 300,000,000    
Debt percentage of principal amount 3.45%