XML 92 R74.htm IDEA: XBRL DOCUMENT v3.8.0.1
Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2016
Income Tax Contingency [Line Items]      
Provisional discrete net tax benefit $ (89)    
Estimated effective tax rate 22.50%   26.30%
Effective tax rate 26.50% 21.40%  
Total unfavorable discrete items $ 46 $ 36  
Increase in tax expense and liability for transition tax due to U.S. tax reform 94 0  
Net favorable tax audit settlements and expirations of statutes of limitations 16 16  
Benefit relating to the U.S. domestic production activities deduction   $ 16  
Foreign Tax Authority | Argentina Tax Authority      
Income Tax Contingency [Line Items]      
Benefit from pending tax refund claim $ 18