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SHORT-TERM DEBT Credit Facility (Details) - USD ($)
$ in Millions
Mar. 13, 2019
Apr. 30, 2019
Line of Credit Facility    
Initiation date of credit facility Mar. 13, 2019  
Expiration date of credit facility Mar. 13, 2024  
Credit faciity terms (in years) five  
New maximum borrowing capacity of credit facility   $ 1,000
Amount outstanding on credit facility   $ 0