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Supplemental Income (Loss) Statement Information
 12 Months Ended
Dec. 31, 2024
Other Income and Expenses [Abstract]  
Supplemental Income (Loss) Statement Information
NOTE 7. Supplemental Income (Loss) Statement Information
Other expense (income), net consists of the following:
(Millions)202420232022
Interest expense$1,191 $941$462 
Interest income(452)(250)(65)
Pension and postretirement net periodic benefit cost (benefit)828 (109)(232)
Solventum ownership - change in value
(1,564)—— 
Total$3$582$165 
Interest expense includes $472 million, $565 million and $462 million in 2024, 2023 and 2022, respectively, related to outstanding debt. Beginning in 2023, interest expense also includes imputed interest associated with the obligations resulting from the PWS Settlement and the CAE Settlement (discussed in Note 19).
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. The non-service cost component above for the 2024 was impacted by a $0.8 billion pension settlement charge. Refer to Note 15 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 December 31, 2024, the balance of net unrealized gain on this investment is $1.6 billion.