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Segments (Tables)
9 Months Ended
Sep. 30, 2018
Segment Reporting [Abstract]  
Operating results and capital expenditures information by segment
The following table summarizes certain operating results and capital expenditures information by segment:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(in millions)
2018
 
2017
 
2018
 
2017
Net sales
 
 
 
 
 
 
 
Petroleum
$
1,857

 
$
1,386

 
$
5,139

 
$
4,148

Nitrogen Fertilizer
80

 
69

 
253

 
253

Other
(2
)
 
(1
)
 
(6
)
 
(6
)
Total
$
1,935

 
$
1,454

 
$
5,386

 
$
4,395

Operating Income
 
 
 
 
 
 
 
Petroleum
$
176

 
$
99

 
$
390

 
$
157

Nitrogen Fertilizer
3

 
(16
)
 
(1
)
 
2

Other
(5
)
 
(4
)
 
(14
)
 
(11
)
Total operating income
174

 
79

 
375

 
148

Interest expense, net
(26
)
 
(28
)
 
(79
)
 
(81
)
Loss on derivatives, net
5

 
(17
)
 
75

 
(5
)
Other income, net
3

 

 
6

 

Earnings before income taxes
$
156

 
$
34

 
$
377

 
$
62

Depreciation and amortization
 
 
 
 
 
 
 
Petroleum
34

 
33

 
101

 
100

Nitrogen Fertilizer
16

 
20

 
53

 
55

Other
1

 
1

 
5

 
4

Total
$
51

 
$
54

 
$
159

 
$
159

Capital expenditures
 
 
 
 
 
 
 
Petroleum
$
18

 
$
19

 
$
50

 
$
66

Nitrogen Fertilizer
6

 
3

 
15

 
11

Other
2

 
1

 
3

 
3

Total
$
26

 
$
23

 
$
68

 
$
80


The following table summarizes total assets by segment:
(in millions)
As of September 30, 2018
 
As of December 31, 2017
Total assets
 
 
 
Petroleum
$
2,505

 
$
2,270

Nitrogen Fertilizer
1,219

 
1,234

Other
278

 
303

Total
$
4,002

 
$
3,807