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Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2025
Fair Value Disclosures [Abstract]  
Fair Value, Assets and Liabilities Measured on Recurring Basis The following table presents our assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy.
December 31, 2025December 31, 2024
TotalLevel 1Level 2TotalLevel 1Level 2
Assets
Money market funds$3,793 $3,793 $6,475 $6,475 
Available-for-sale debt investments:
Commercial paper163 $163 165 $165 
Corporate notes344 344 335 335 
U.S. government agencies27  27 17 17 
Other equity investments9 9 9 9 
Derivatives193 193 65 65 
Total assets$4,529 $3,802 $727 $7,066 $6,484 $582 
Liabilities
Derivatives($43)($43)($218)($218)
Total liabilities($43)($43)($218)($218)
Fair Value, Assets Measured on Nonrecurring Basis Using Unobservable Inputs The following table presents the nonrecurring losses recognized for the years ended December 31 due to long-lived asset impairment and the fair value of the related assets as of the impairment date:
20252024
Fair Value
Total Losses
Fair Value
Total Losses
Property, plant and equipment  $32 ($54)
Investments ($41) (32)
Other assets
$2 (4)6 (21)
Operating lease equipment
  15 (5)
Total$2 ($45)$53 ($112)
Fair Values and Related Carrying Values of Financial Instruments
The fair values and related carrying values of financial instruments that are not required to be remeasured at fair value on the Consolidated Statements of Financial Position at December 31 were as follows:
December 31, 2025
Carrying AmountTotal Fair ValueLevel 1Level 2Level 3
Assets
Notes receivable, net$21 $21 $13 $8 
Liabilities
Debt, excluding finance lease obligations(53,848)(53,769)(53,769)
December 31, 2024
Carrying AmountTotal Fair ValueLevel 1Level 2Level 3
Assets
Notes receivable, net$940 $953 $941 $12 
Liabilities
Debt, excluding finance lease obligations(53,625)(51,089)(51,089)