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Business Segments (Tables)
12 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
Summary of operating results, capital expenditures, and total asset information by segment
The following tables summarize operating results, capital expenditures, and total asset information by segment:
Year Ended December 31,
(in millions)202120202019
Net sales:
Petroleum$6,721 $3,586 $5,968 
Nitrogen Fertilizer533 350 404 
Other(12)(6)(8)
Total net sales$7,242 $3,930 $6,364 
Operating income (loss):
Petroleum$(27)$(281)$574 
Nitrogen Fertilizer134 (35)27 
Other(20)(17)(21)
Total operating income (loss)
87 (333)580 
Interest expense, net(117)(130)(102)
Investment income from marketable securities81 41 — 
Other income, net15 13 
Income (loss) before income tax expense$66 $(415)$491 
Depreciation and amortization:
Petroleum$203 $202 $202 
Nitrogen Fertilizer73 76 80 
Other (2)
3 — 
Total depreciation and amortization$279 $278 $287 
Capital expenditures: (1)
Petroleum$50 $90 $89 
Nitrogen fertilizer26 16 20 
Other (2)
150 15 
Total capital expenditures$226 $121 $114 

The following table summarizes total assets by segment:
December 31,
(in millions)20212020
Petroleum$3,368 $2,991 
Nitrogen Fertilizer1,127 1,033 
Other, including intersegment eliminations(589)(46)
Total assets$3,906 $3,978 
(1)Capital expenditures are shown exclusive of capitalized turnaround expenditures and business combinations.
(2)Other includes expenses related to and amounts incurred for the Wynnewood renewable diesel unit project.