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SUPPLEMENTAL FINANCIAL INFORMATION
 3 Months Ended
Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
SUPPLEMENTAL FINANCIAL INFORMATION SUPPLEMENTAL FINANCIAL INFORMATION
Allowance for Doubtful Accounts
The following table is a summary of the changes in our allowance for doubtful accounts for the three months ended March 31, 2023 and 2022.
Three months ended
March 31,
(in millions)20232022
Balance at beginning of period$114 $122 
Charged to costs and expenses7 6 
Write-offs(1)(1)
Currency translation adjustments2 2 
Balance at end of period$122 $129 
Inventories
(in millions)March 31,
2023		December 31,
2022
Raw materials$812 $738 
Work in process316 293 
Finished goods1,794 1,687 
Inventories$2,922 $2,718 
Property, Plant and Equipment, Net
(in millions)March 31,
2023		December 31,
2022
Property, plant and equipment, at cost$11,622 $11,421 
Accumulated depreciation(6,622)(6,442)
Property, plant and equipment, net$5,000 $4,979 
Interest Expense, Net
Three months ended
March 31,
(in millions)20232022
Interest expense, net of capitalized interest$127 $88 
Interest income(10)(3)
Interest expense, net$117 $85 
Other Income, Net
Three months ended
March 31,
(in millions)20232022
Foreign exchange (gains) losses, net$14 $(11)
Pension and other postretirement benefit plans(10)(5)
Change in fair value of marketable equity securities(5)1 
Other, net— (1)
Other income, net$(1)$(16)
Non-Cash Operating and Investing Activities
Right-of-use operating lease assets obtained in exchange for lease obligations for the three months ended March 31, 2023 and 2022 were $26 million and $14 million, respectively.
Purchases of property, plant and equipment included in accounts payable as of March 31, 2023 and 2022 were $70 million and $53 million, respectively.