The major components of other income and other operating expenses consisted of the following in millions of dollars: | | | | | | | | | | | | | 2020 | | 2019 | | 2018 | | Other income | | | | | | | | | | | Revenues from services | | $ | 314 | | $ | 348 | | $ | 347 | | Insurance premiums and fees earned* | | | 223 | | | 214 | | | 217 | | Investment income | | | 26 | | | 25 | | | 14 | | Other | | | 255 | | | 292 | | | 322 | | Total | | $ | 818 | | $ | 879 | | $ | 900 | | | | | | | | | | | | | Other operating expenses | | | | | | | | | | | Depreciation of equipment on operating leases | | $ | 1,083 | | $ | 981 | | $ | 928 | | Insurance claims and expenses* | | | 231 | | | 210 | | | 175 | | Cost of services | | | 188 | | | 228 | | | 211 | | Operating lease residual losses and impairments | | | 52 | | | 159 | | | 26 | | Pension and OPEB (benefit) cost, excluding service cost component | | | (31) | | | (67) | | | 15 | | Other | | | 89 | | | 67 | | | 44 | | Total | | $ | 1,612 | | $ | 1,578 | | $ | 1,399 | |
* Primarily related to extended warranties (see Note 21).
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