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Supplemental Income Statement Information (Tables)
 9 Months Ended
Sep. 30, 2025
Other Income and Expenses [Abstract]  
Schedule of Other Expense (Income), Net
Other expense (income), net consists of the following:
Three months ended September 30,Nine months ended September 30,
(Millions)2025202420252024
Interest expense2
$232 $276 $724 $939 
Interest income(46)(107)(175)(360)
Pension and postretirement net periodic benefit cost (benefit)3
20 7 71 792 
Solventum ownership - change in value4
94 (581)(242)(1,694)
Total$300 $(405)$378$(323)
2 Interest expense related to outstanding debt is as follows below. Interest expense in the table above also includes imputed interest associated with the obligations resulting from the PWS Settlement, New Jersey Settlement, and CAE Settlement (all discussed in Note 17).
Three months ended September 30,Nine months ended September 30,
(Millions)2025202420252024
Interest expense related to outstanding debt
$114 $114$340 $371
3 Pension and postretirement net periodic benefit income described in the table above includes 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).
4 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). As of September 30, 2025, the balance of unrealized gain on this investment was $1.3 billion.