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DEBT - Narrative (Details)
$ in Millions
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]    
Fair value of total debt $ 6,000 $ 6,300
Available proceeds under program 300  
Letters of credit and surety bonds outstanding $ 457 $ 519
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 1.88  
Global revolving credit facility | Letter of Credit    
Debt Instrument [Line Items]    
Line of credit remaining capacity $ 1,300