Annual report pursuant to Section 13 and 15(d)

FAIR VALUE - INSTRUMENTS MEASURED AT FAIR VALUE ON A RECURRING BASIS USING SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) AND INSTRUMENTS MEASURED AT FAIR VALUE ON A NON-RECURRING BASIS (Details)

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FAIR VALUE - INSTRUMENTS MEASURED AT FAIR VALUE ON A RECURRING BASIS USING SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) AND INSTRUMENTS MEASURED AT FAIR VALUE ON A NON-RECURRING BASIS (Details)
$ in Millions
1 Months Ended 12 Months Ended
Feb. 28, 2019
USD ($)
Dec. 31, 2019
USD ($)
item
Dec. 31, 2018
USD ($)
item
Reconciliation of beginning and ending balances for assets measured at fair value on a recurring basis      
Number of instruments categorized as Level 3 | item   0 0
Cash received from forward swap contract related to the sale of investment in Venator   $ 16 $ 3
Recurring basis      
Reconciliation of beginning and ending balances for assets measured at fair value on a recurring basis      
Cash received from forward swap contract related to the sale of investment in Venator $ 16    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings   $ 0 $ 0