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Selected Quarterly Financial Data (Unaudited)
 12 Months Ended
Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]  
Selected Quarterly Financial Data (Unaudited)
SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)
 
(Millions of dollars)
 
 
 
 
 
 
2018
 
First quarter
 
Second quarter
 
Third quarter
 
Fourth quarter
Total revenues
 
$
690

 
$
723

 
$
735

 
$
699

Profit before income taxes
 
$
124

 
$
100

 
$
163

 
$
46

Profit
 
$
91

 
$
71

 
$
125

 
$
18

 
 
 
 
 
 
 
 
 
2017
 
First quarter
 
Second quarter
 
Third quarter
 
Fourth quarter
Total revenues
 
$
662

 
$
676

 
$
673

 
$
678

Profit before income taxes
 
$
167

 
$
164

 
$
126

 
$
133

Profit
 
$
115

 
$
114

 
$
86

 
$
271