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Supplemental Income Statement Information
 3 Months Ended
Mar. 31, 2025
Other Income and Expenses [Abstract]  
Supplemental Income Statement Information
NOTE 7. Supplemental Income Statement Information
Other expense (income), net consists of the following:
Three months ended
March 31,
(Millions)20252024
Interest expense$255 $341 
Interest income(79)(110)
Pension and postretirement net periodic benefit cost (benefit)28 (11)
Solventum ownership - change in value
(343)— 
Total$(139)$220 
Interest expense includes $110 million and $137 million during the three months ended March 31, 2025 and 2024, respectively, related to outstanding debt. Interest expense also includes imputed interest associated with the obligations resulting from the PWS Settlement and the CAE Settlement (discussed in Note 17).
Pension and postretirement net periodic benefit income described in the table above include all components of defined benefit plan net periodic benefit cost (benefit) except service cost, which is reported in various operating expense lines. Refer to Note 13 for additional details on the components of pension and postretirement net periodic benefit cost (benefit).
Solventum ownership - change in value relates to the change in value of 3M's retained ownership interest in common stock of Solventum Corporation, an independent public company. Solventum separated from 3M in April 2024 (discussed in Note 2). At March 31, 2025, the balance of unrealized gain on this investment is $1.9 billion.