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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
OPERATING REVENUES |  |  |
Operating revenues | $ 6,557 | $ 6,676 | $ 6,818
Operating revenues - affiliates | 2,407 | 2,162 | 1,935
Total operating revenues | 8,964 | 8,838 | 8,753
OPERATING EXPENSES |  |  |
Cost of services and products (exclusive of depreciation and amortization) | 2,872 | 2,879 | 2,790
Selling, general and administrative | 1,015 | 1,086 | 1,062
Operating expenses - affiliates | 960 | 756 | 695
Depreciation and amortization | 1,857 | 2,005 | 2,128
Total operating expenses | 6,704 | 6,726 | 6,675
OPERATING INCOME | 2,260 | 2,112 | 2,078
OTHER (EXPENSE) INCOME |  |  |
Interest expense | (473) | (464) | (450)
Interest expense - affiliates, net | (53) | (40) | (64)
Other (expense) income, net | (1) | 1 | 2
Total other expense, net | (527) | (503) | (512)
INCOME BEFORE INCOME TAX EXPENSE | 1,733 | 1,609 | 1,566
Income tax expense | 659 | 639 | 602
NET INCOME | $ 1,074 | $ 970 | $ 964

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