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Other Income - Net | 12 Months Ended
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Dec. 31, 2018
Other Income and Expenses [Abstract] |
Other Income - Net | Other Income - Net The Company derives income from items that are not considered operating activities. Income from these items is reported net of related expense. All components of net periodic pension and postretirement benefit costs, excluding service cost, are included in other income - net. Miscellaneous income (expense) may fluctuate due to timing and includes investment gains, losses and interest income as well as other non-operating activities. As substantially all real estate activities are focused on supporting railroad operations, beginning in first quarter 2017, all results of these activities are included in operating income. Previously, these activities were classified as operating or non-operating based on the nature of the activity. The results of these activities were not material in 2016 and were not reclassified. Net periodic pension and postretirement benefit credit increased from 2016 to 2017 primarily due to adoption in 2017 of the spot rate approach for measuring employee benefit plan interest costs, pension contributions in 2016 and other favorable benefit plan experience. Interest income increased from 2017 to 2018 primarily as a result of higher average investment balances. Income from real estate operations were recorded as part of operating expenses during 2018 and 2017. Other income – net consisted of the following:
| Fiscal Years
(Dollars in Millions) | 2018 |  | 2017 |  | 2016
Net Periodic Pension and Postretirement Benefit Credit (Expense) (a) | $ | 38 |  |  | $ | 32 |  |  | $ | (24 | )
Interest Income | 32 |  |  | 13 |  |  | 10 |
Income from Non-operating Real Estate Activities | — |  |  | — |  |  | 27 |
Miscellaneous Income | 4 |  |  | 8 |  |  | 9 |
Total Other Income - Net | $ | 74 |  |  | $ | 53 |  |  | $ | 22 |
Gross Revenue from Real Estate Operations included above | $ | — |  |  | $ | — |  |  | $ | 56 |
(a) Excludes the service cost component of net periodic benefit cost.

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- Definition The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -URI http://asc.fasb.org/topic&trid=2122503 Reference 2: 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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