Summary of Significant Accounting Policies (Policies)	3 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]
Restricted Cash	Restricted Cash. Restricted cash principally represents those cash balances in our commodity futures brokerage accounts that are restricted from withdrawal.
Earnings Per Common Share	Earnings Per Common Share. Basic earnings per share attributable to UGI stockholders reflect the weighted-average number of common shares outstanding. Diluted earnings per share attributable to UGI stockholders include the effects of dilutive stock options, common stock awards and Equity Units.
Derivative Instruments	Derivative Instruments. Derivative instruments are reported on the Condensed Consolidated Balance Sheets at their fair values, unless the NPNS exception is elected. The accounting for changes in fair value depends upon the purpose of the derivative instrument, whether it is subject to regulatory ratemaking mechanisms or if it qualifies and is designated as a hedge for accounting purposes. Certain of our derivative instruments qualify and are designated as cash flow hedges. For cash flow hedges, changes in the fair values of the derivative instruments are recorded in AOCI, to the extent effective at offsetting changes in the hedged item, until earnings are affected by the hedged item. We discontinue cash flow hedge accounting if occurrence of the forecasted transaction is determined to be no longer probable. Hedge accounting is also discontinued for derivatives that cease to be highly effective. We do not designate our commodity and certain foreign currency derivative instruments as hedges under GAAP. Changes in the fair values of these derivative instruments are reflected in net income. Gains and losses on substantially all of the commodity derivative instruments used by Utilities are included in regulatory assets or liabilities because it is probable such gains or losses will be recoverable from, or refundable to, customers. From time to time, we also enter into net investment hedges. Gains and losses on net investment hedges that relate to our foreign operations are included in the cumulative translation adjustment component in AOCI until such foreign net investment is substantially sold or liquidated. Cash flows from derivative instruments, other than net investment hedges, are included in cash flows from operating activities on the Condensed Consolidated Statements of Cash Flows. Cash flows from net investment hedges are included in cash flows from investing activities on the Condensed Consolidated Statements of Cash Flows.
Use of Estimates	Use of Estimates. The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses and costs. These estimates are based on management’s knowledge of current events, historical experience and various other assumptions that are believed to be reasonable under the circumstances. Accordingly, actual results may be different from these estimates and assumptions.
Goodwill	Goodwill. We do not amortize goodwill, but test it at least annually for impairment at the reporting unit level. A reporting unit is an operating segment, or one level below an operating segment (a component) if it constitutes a business for which discrete financial information is available and regularly reviewed by segment management. Components are aggregated into a single reporting unit if they have similar economic characteristics. Each of our reporting units with goodwill is required to perform impairment tests annually or whenever events or circumstances indicate that the value of goodwill may be impaired. As previously disclosed in Note 12 in the Company’s 2023 Annual Report, a non-cash pre-tax goodwill impairment charge of $656 was recognized in Fiscal 2023 to reduce the carrying value of the AmeriGas Propane reporting unit to its fair value. The Company continues to monitor the AmeriGas Propane reporting unit for any changes in facts and circumstances that would indicate it is more likely than not that the fair value of the AmeriGas Propane reporting unit is less than its carrying amount. No such indicators were identified at December 31, 2023, however if AmeriGas Propane were not able to achieve its anticipated results and/or if its discount rate were to increase, its fair value would be adversely affected, which may result in further impairment. There is approximately $1.3 billion of goodwill in this reporting unit as of December 31, 2023. With respect to UGI International's Fiscal 2023 goodwill impairment test, we determined that UGI International’s fair value exceeded its carrying value by approximately 10%. While the Company believes that its judgments used in the quantitative assessment of UGI International’s fair value are reasonable based upon currently available facts and circumstances, if UGI International were not able to achieve its anticipated results and/or if its discount rate were to increase, its fair value would be adversely affected, which may result in an impairment. There were no changes in facts and circumstances that would indicate that it is more likely than not that the fair value of the UGI International reporting unit may not be in excess of its book value at December 31, 2023. There is approximately $953 of goodwill in this reporting unit as of December 31, 2023. The Company will continue to monitor its reporting units and related goodwill for any possible future non-cash impairment charges.
Accounting Standards Not Yet Adopted	Accounting Standards Not Yet Adopted. Segment Reporting. In November 2023, the FASB issued ASU 2023-07, “Improvements to Reportable Segment Disclosures (Topic 280)” which requires enhanced disclosure of (1) significant segment expenses that are regularly provided to the CODM and included within each reported measure of segment profit or loss, (2) the amount and description of the composition of other segment items which reconcile to segment profit or loss, and (3) the title and position of the entity’s CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and allocating resources. The amendments also expand the interim segment disclosure requirements. This new guidance is effective for the Company for annual periods beginning October 1, 2024 (Fiscal 2025) and interim periods beginning October 1, 2025 (Fiscal 2026). Early adoption is permitted. The amendments in this ASU apply retrospectively to all prior periods presented in the financial statements. The Company is in the process of assessing the impact on its financial statements from the adoption of the new guidance and the period in which the new guidance will be adopted. Improvements to Income Tax Disclosures. In December 2023, the FASB issued ASU 2023-09, “Improvements to Income Tax Disclosures (Topic 740)” which requires entities to disclose, among other items, disaggregated information about a reporting entity’s effective tax rate reconciliation and income taxes paid. This new guidance is effective for the Company for annual periods beginning October 1, 2025 (Fiscal 2026). Early adoption is permitted. The amendments in this ASU may be adopted using the prospective or retrospective methods. The Company is in the process of assessing the impact on its financial statements and determining the transition method and the period in which the new guidance will be adopted.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Dec. 31, 2023

Restricted Cash. Restricted cash principally represents those cash balances in our commodity futures brokerage accounts that are restricted from withdrawal.

Earnings Per Common Share

Earnings Per Common Share. Basic earnings per share attributable to UGI stockholders reflect the weighted-average number of common shares outstanding. Diluted earnings per share attributable to UGI stockholders include the effects of dilutive stock options, common stock awards and Equity Units.

Derivative Instruments

Derivative Instruments. Derivative instruments are reported on the Condensed Consolidated Balance Sheets at their fair values, unless the NPNS exception is elected. The accounting for changes in fair value depends upon the purpose of the derivative instrument, whether it is subject to regulatory ratemaking mechanisms or if it qualifies and is designated as a hedge for accounting purposes.

Certain of our derivative instruments qualify and are designated as cash flow hedges. For cash flow hedges, changes in the fair values of the derivative instruments are recorded in AOCI, to the extent effective at offsetting changes in the hedged item, until earnings are affected by the hedged item. We discontinue cash flow hedge accounting if occurrence of the forecasted transaction is determined to be no longer probable. Hedge accounting is also discontinued for derivatives that cease to be highly effective. We do not designate our commodity and certain foreign currency derivative instruments as hedges under GAAP. Changes in the fair values of these derivative instruments are reflected in net income. Gains and losses on substantially all of the commodity derivative instruments used by Utilities are included in regulatory assets or liabilities because it is probable such gains or losses will be recoverable from, or refundable to, customers. From time to time, we also enter into net investment hedges. Gains and losses on net investment hedges that relate to our foreign operations are included in the cumulative translation adjustment component in AOCI until such foreign net investment is substantially sold or liquidated.

Cash flows from derivative instruments, other than net investment hedges, are included in cash flows from operating activities on the Condensed Consolidated Statements of Cash Flows. Cash flows from net investment hedges are included in cash flows from investing activities on the Condensed Consolidated Statements of Cash Flows.

Use of Estimates

Use of Estimates. The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses and costs. These estimates are based on management’s knowledge of current events, historical experience and various other assumptions that are believed to be reasonable under the circumstances. Accordingly, actual results may be different from these estimates and assumptions.

Goodwill

Goodwill. We do not amortize goodwill, but test it at least annually for impairment at the reporting unit level. A reporting unit is an operating segment, or one level below an operating segment (a component) if it constitutes a business for which discrete financial information is available and regularly reviewed by segment management. Components are aggregated into a single reporting unit if they have similar economic characteristics. Each of our reporting units with goodwill is required to perform impairment tests annually or whenever events or circumstances indicate that the value of goodwill may be impaired.

As previously disclosed in Note 12 in the Company’s 2023 Annual Report, a non-cash pre-tax goodwill impairment charge of $656 was recognized in Fiscal 2023 to reduce the carrying value of the AmeriGas Propane reporting unit to its fair value. The Company continues to monitor the AmeriGas Propane reporting unit for any changes in facts and circumstances that would

indicate it is more likely than not that the fair value of the AmeriGas Propane reporting unit is less than its carrying amount. No such indicators were identified at December 31, 2023, however if AmeriGas Propane were not able to achieve its anticipated results and/or if its discount rate were to increase, its fair value would be adversely affected, which may result in further impairment. There is approximately $1.3 billion of goodwill in this reporting unit as of December 31, 2023.

With respect to UGI International's Fiscal 2023 goodwill impairment test, we determined that UGI International’s fair value exceeded its carrying value by approximately 10%. While the Company believes that its judgments used in the quantitative assessment of UGI International’s fair value are reasonable based upon currently available facts and circumstances, if UGI International were not able to achieve its anticipated results and/or if its discount rate were to increase, its fair value would be adversely affected, which may result in an impairment. There were no changes in facts and circumstances that would indicate that it is more likely than not that the fair value of the UGI International reporting unit may not be in excess of its book value at December 31, 2023. There is approximately $953 of goodwill in this reporting unit as of December 31, 2023. The Company will continue to monitor its reporting units and related goodwill for any possible future non-cash impairment charges.

Accounting Standards Not Yet Adopted

Accounting Standards Not Yet Adopted.

Segment Reporting. In November 2023, the FASB issued ASU 2023-07, “Improvements to Reportable Segment Disclosures (Topic 280)” which requires enhanced disclosure of (1) significant segment expenses that are regularly provided to the CODM and included within each reported measure of segment profit or loss, (2) the amount and description of the composition of other segment items which reconcile to segment profit or loss, and (3) the title and position of the entity’s CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and allocating resources. The amendments also expand the interim segment disclosure requirements. This new guidance is effective for the Company for annual periods beginning October 1, 2024 (Fiscal 2025) and interim periods beginning October 1, 2025 (Fiscal 2026). Early adoption is permitted. The amendments in this ASU apply retrospectively to all prior periods presented in the financial statements. The Company is in the process of assessing the impact on its financial statements from the adoption of the new guidance and the period in which the new guidance will be adopted.

Improvements to Income Tax Disclosures. In December 2023, the FASB issued ASU 2023-09, “Improvements to Income Tax Disclosures (Topic 740)” which requires entities to disclose, among other items, disaggregated information about a reporting entity’s effective tax rate reconciliation and income taxes paid. This new guidance is effective for the Company for annual periods beginning October 1, 2025 (Fiscal 2026). Early adoption is permitted. The amendments in this ASU may be adopted using the prospective or retrospective methods. The Company is in the process of assessing the impact on its financial statements and determining the transition method and the period in which the new guidance will be adopted.