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INCOME TAXES
6 Months Ended
Jun. 30, 2020
Income Tax Disclosure [Abstract]  
PROVISION FOR INCOME TAXES INCOME TAXES
 Second QuarterFirst Six Months
(Dollars in millions)2020201920202019
$%$%$%$%
(Benefit from) provision for income taxes and tax rate$(31) —  $57  18 %$25  %$112  19 %

Second quarter and first six months 2020 effective tax rates included a $19 million decrease to the provision for income taxes as a result of a decrease in unrecognized tax positions and a $7 million decrease to the provision for income taxes related to estimated adjustments to certain prior year tax returns. Second quarter and first six months 2019 effective tax rates included adjustments to the tax provision to reflect planned amendments to and expected finalization of a prior year's income tax return in a foreign jurisdiction.

At June 30, 2020, Eastman had $192 million in unrecognized tax benefits. At June 30, 2020, it is reasonably possible that, as a result of the resolution of federal, state, and foreign examinations and appeals, and the expiration of various statutes of limitation, the total amounts of unrecognized tax benefits could decrease by $10 million to $20 million within the next 12 months.