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Divestitures and Discontinued Operations (Tables)
 12 Months Ended
Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]  
Revenues and Earnings (losses) of Businesses Included in Discontinued Operations
The earnings (losses) of the businesses included in discontinued operations for the periods presented were as follows:
Earnings (loss) from discontinued operations net of tax:
2017
 
2016
 
2015
 
eCas business line
$
—

 
$
—

 
$
(4
)
 
Participacoes operations
—

 
1

 
(3
)
 
   Total discontinued operations
$
—

 
$
1

 
$
(7
)