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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]  
Schedule of inventories
Inventories consisted of the following:
December 31,
(in millions)20202019
Finished goods$133 $177 
Raw materials83 112 
In-process inventories16 18 
Parts and supplies66 66 
     Total Inventories$298 $373 
Schedule of lives used in computing depreciation for depreciable assets and components of property, plant and equipment, net The lives used in computing depreciation for significant asset classes are as follows:
Asset
Range of Useful
Lives, in Years
Land and improvements
10 to 30
Buildings and improvements
1 to 30
Machinery and equipment
2 to 30
Furniture and fixtures
3 to 10
Right-of-use (“ROU”) finance leases
3 to 18
Other
5 to 30

Property, plant and equipment, net consisted of the following:
December 31,
(in millions)20202019
Machinery and equipment$3,881 $3,805 
Buildings and improvements88 87 
ROU finance leases80 81 
Land and improvements47 46 
Furniture and fixtures38 35 
Construction in progress100 95 
Other15 14 
4,249 4,163 
Less: Accumulated depreciation2,009 1,827 
     Total Property, plant and equipment, net$2,240 $2,336 
Effect of accounting standards adoption and accounting changes on financial statements
The following presents the financial statement line items impacted by the Petroleum Segment turnaround accounting change for each of the periods presented within these consolidated financial statements.

Effect of Turnaround Accounting on Consolidated Statement of Operations and Consolidated Statement of Cash Flows for the Year Ended December 31, 2018
Year Ended December 31,
2018
(in millions)As Previously ReportedEffect of Turnaround Accounting ChangeAs Stated
Consolidated Statement of Operations
Direct operating expenses$523 $(6)$517 
Depreciation and amortization202 61 263 
Income tax expense (benefit)89 (10)79 
Net income (loss)$411 $(45)$366 
Less: Net income (loss) attributable to noncontrolling interest122 (15)107 
Net income (loss) attributable to CVR Energy stockholders$289 $(30)$259 
Consolidated Statement of Cash Flows
Net cash provided by operating activities$620 $$628 
Net cash used by investing activities$(100)$(8)$(108)