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INCOME TAXES (Tables)
 3 Months Ended
Mar. 31, 2020
Income Tax Disclosure [Abstract]  
Schedule of Unrecognized Tax Benefits
The following table summarizes the activity related to our unrecognized tax benefits (excluding interest and penalties) during the three months ended March 31, 2020.
($ in millions)
Unrecognized Tax Benefits
Balance at December 31, 2019
$
21

Decreases related to settlements with taxing authorities
(10
)
Decreases related to tax positions taken during a prior period
(1
)
Balance at March 31, 2020
$
10