Other Nonoperating Income, Net

9 Months Ended

Sep. 30, 2021

Other Income And Expenses [Abstract]

Other Nonoperating Income, Net

15. Other Nonoperating Income, Net

For the three and nine months ended September 30, 2021, the increase in other nonoperating income, net, was primarily attributable to lower pension expense of $3.9 million and $11.8 million, respectively, compared with the prior-year periods. For the nine months ended September 30, 2020, other nonoperating income, net, included $5.6 million of third-party railroad track maintenance expense and reflected a $8.9 million reduction in pension expense compared with the prior-year period.