Income Taxes |
6 Months Ended |
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Mar. 31, 2026 | |
| Income Tax Disclosure [Abstract] | |
| Income Taxes | Income Taxes The effective tax rates for the quarters ended March 31, 2026 and March 31, 2025 were 25.0% and 24.8%, respectively. The effective income tax rate for the quarter ended March 31, 2026 was generally consistent with the prior year quarter ended March 31, 2025. The effective tax rates for the six months ended March 31, 2026 and March 31, 2025 were 24.9% and 24.0%, respectively. The change in the effective income tax rate was primarily driven by the impact of the impairment of the exploration and production properties under the ceiling test, as well as an impairment of certain water disposal assets, both of which were recorded in the quarter ended December 31, 2024, which resulted in a smaller income tax expense on income before income taxes to be recorded during the six months ended March 31, 2025.
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