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Supplemental Income Statement Information | 3 Months Ended
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Mar. 31, 2020
Supplemental Income Statement Information |
Supplemental Income Statement Information | NOTE 6. Supplemental Income Statement Information ​ Other expense (income), net consists of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three months ended
​ | ​ | March 31,
(Millions) | ​ | 2020 |  | 2019
Interest expense | ​ | $ | 123 | ​ | $ | 104
Interest income | ​ |  | (10) | ​ |  | (20)
Pension and postretirement net periodic benefit cost (benefit) | ​ | ​ | (17) | ​ | ​ | (36)
Total | ​ | $ | 96 | ​ | $ | 48
​ Pension and postretirement net periodic benefit costs described in the table above include all components of defined benefit plan net periodic benefit costs except service cost, which is reported in various operating expense lines. Refer to Note 11 for additional details on the components of pension and postretirement net periodic benefit costs.

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- Definition The entire disclosure for interest and other income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 610 -URI http://asc.fasb.org/topic&trid=49130413 + Details
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