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Summary of Significant Accounting Policies - Property, Plant and Equipment and Related Depreciation (Details) - USD ($) | 12 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Depreciation expense included in cost of sales | $ 0 | $ 0 | $ 0
UGI Utilities, Inc. |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Amortization period | 5 years |  |

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- Definition Public Utilities, Retired Property, Plant and Equipment, Amortization Period + References No definition available. + Details
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- Definition Amount of expense for allocation of cost of tangible asset over its useful life directly used in production of good and rendering of service. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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