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v3.23.3

Income Taxes - Deferred Tax Liabilities (Assets) (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Sep. 30, 2022
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Excess book basis over tax basis of property, plant and equipment | $ 966 | $ 867
Utility regulatory assets | 84 | 106
Intangible assets and goodwill | 81 | 75
Derivative instrument assets | 19 | 514
Other | 37 | 33
Gross deferred tax liabilities | 1,187 | 1,595
Investment in AmeriGas Partners | (28) | (79)
Pension plan liabilities | (14) | (21)
Employee-related benefits | (37) | (38)
Operating loss carryforwards | (75) | (48)
Foreign tax credit carryforwards | (64) | (76)
Utility regulatory liabilities | (83) | (85)
Utility environmental liabilities | (15) | (15)
Interest expense | (83) | (51)
Other | (58) | (74)
Gross deferred tax assets | (457) | (487)
Deferred tax assets valuation allowance | 141 | 141
Net deferred tax liabilities | $ 871 | $ 1,249

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