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v3.22.1

CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021
Operating revenues |  |  |  |
Sales of Electricity | $ 2,848 | $ 2,533 | $ 5,386 | $ 4,803
Other revenue | 36 | 39 | 81 | 73
Revenues | 2,884 | 2,572 | 5,467 | 4,876
Operating expenses |  |  |  |
Fuel | 558 | 413 | 1,024 | 782
Purchased power | 374 | 225 | 743 | 431
Operating and maintenance | 767 | 644 | 1,547 | 1,359
Depreciation and amortization | 512 | 381 | 1,022 | 759
Tax equivalents | 138 | 124 | 271 | 245
Total operating expenses | 2,349 | 1,787 | 4,607 | 3,576
Operating income | 535 | 785 | 860 | 1,300
Other income (expense), net | 3 | 11 | 17 | 26
Defined Benefit Plan, Other Cost (Credit) | 65 | 64 | 130 | 129
Interest expense |  |  |  |
Interest expense | 264 | 276 | 527 | 557
Net income (loss) | $ 209 | $ 456 | $ 220 | $ 640

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