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PROVISION FOR INCOME TAXES
3 Months Ended
Mar. 31, 2016
Income Tax Disclosure [Abstract]  
PROVISION FOR INCOME TAXES
PROVISION FOR INCOME TAXES
 
First Quarter
(Dollars in millions)
2016
 
2015
Provision for income taxes
$
72

 
$
84

Effective tax rate
22
%
 
33
%


The first quarter 2016 effective tax rate reflects a $9 million tax benefit primarily due to adjustments to the tax provision to reflect the finalization of 2014 foreign income tax returns. The first quarter 2016 effective tax rate also reflects a benefit from the timing of the extension of favorable U.S. federal tax provisions, primarily research and development ("R&D") tax credits and deferral of certain earnings of foreign subsidiaries from U.S. income taxes. The first quarter 2015 effective tax rate was negatively impacted by limited deductibility of costs for shutdown of the Workington, UK acetate tow manufacturing facility.