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Segment Information (Notes)
 3 Months Ended
Mar. 31, 2021
Segment Reporting [Abstract]  
Segment Information Segment Information
The Company operates in two principal operating segments: Vinyls and Olefins. These segments are strategic business units that offer a variety of different products. The Company manages each segment separately as each business requires different technology and marketing strategies.
Three Months Ended March 31,
20212020
Net external sales
Vinyls
PVC, caustic soda and other$1,408 $1,213 
Building products412 292 
Total Vinyls1,820 1,505 
Olefins
Polyethylene414 310 
Styrene, feedstock and other123 117 
Total Olefins537 427 
$2,357 $1,932 
Intersegment sales
Vinyls$— $— 
Olefins150 68 
$150 $68 
Income (loss) from operations
Vinyls$200 $73 
Olefins180 62 
Corporate and other(34)1 
$346 $136 
Depreciation and amortization
Vinyls$157 $153 
Olefins36 35 
Corporate and other2 2 
$195 $190 
Other income, net
Vinyls$10 $6 
Olefins— 1 
Corporate and other2 4 
$12 $11 
Provision for (benefit from) income taxes
Vinyls$42 $(78)
Olefins41 41 
Corporate and other(11)(4)
$72 $(41)
Three Months Ended March 31,
20212020
Capital expenditures
Vinyls$118 $136 
Olefins23 27 
Corporate and other— 1 
$141 $164 
A reconciliation of total segment income from operations to consolidated income before income taxes is as follows:
Three Months Ended March 31,
20212020
Income from operations$346 $136 
Interest expense(33)(31)
Other income, net12 11 
Income before income taxes$325 $116 

March 31,
2021		December 31,
2020
Total assets
Vinyls$10,791 $10,680 
Olefins1,987 1,923 
Corporate and other1,272 1,232 
$14,050 $13,835