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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
OPERATING REVENUE |  |  |
Total operating revenue | [1] | $ 1,918 | $ 2,030
OPERATING EXPENSES |  |  |
Cost of services and products (exclusive of depreciation and amortization) | [1] | 473 | 582
Selling, general and administrative |  | 143 | 157
Operating expenses - affiliates |  | 195 | 195
Depreciation and amortization |  | 328 | 336
Total Operating Expenses | [1] | 1,139 | 1,270
OPERATING INCOME |  | 779 | 760
OTHER (EXPENSE) INCOME |  |  |
Interest expense |  | (75) | (95)
Interest expense - affiliates, net |  | (16) | (16)
Other (expense) income, net |  | (8) | 9
Total other expense, net |  | (99) | (102)
INCOME BEFORE INCOME TAXES |  | 680 | 658
Income tax expense |  | 177 | 171
NET INCOME |  | 503 | 487
Non-affiliate services |  |  |
OPERATING REVENUE |  |  |
Total operating revenue | [1] | 1,235 | 1,308
Affiliate Services |  |  |
OPERATING REVENUE |  |  |
Total operating revenue |  | $ 683 | $ 722
[1] | Reclassifications were made within certain 2019 comparative figures due to the retrospective application of an accounting policy election during the first quarter of 2020. Refer to Note 1—Background and our Form 8-K filing dated May 7, 2020 for further information.

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