Debt (Details)										1 Months Ended		3 Months Ended		9 Months Ended
	May 31, 2023 USD ($)	May 12, 2023	Apr. 24, 2023 USD ($)	Mar. 31, 2023 USD ($)	Mar. 07, 2023 EUR (€)	Mar. 01, 2023 USD ($)	Feb. 23, 2023 USD ($)	Dec. 13, 2022 USD ($)	Oct. 20, 2022 USD ($)	Jun. 30, 2023 USD ($)	May 31, 2023 USD ($)	Jun. 30, 2023 USD ($) cure	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) cure	Jun. 30, 2022 USD ($)
Debt Instrument [Line Items]
Loss on extinguishments of debt												$ (9,000,000)	$ 0	$ (9,000,000)	$ (11,000,000)
Settlement of Energy Services interest rate swap														$ (32,000,000)	$ 0
Interest rate swaps
Debt Instrument [Line Items]
Fixed rate				3.10%
AmeriGas OLP
Debt Instrument [Line Items]
Capital contributions			$ 11,000,000	$ 20,000,000							$ 52,000,000
2022 AmeriGas OLP Credit Agreement | AmeriGas OLP
Debt Instrument [Line Items]
Permitted usage of equity cure provision | cure												5
Number of equity cure | cure														1
Senior Notes | Senior Notes Due 2028 | AmeriGas Partners And AmeriGas Finance Corp.
Debt Instrument [Line Items]
Principal amount	$ 500,000,000										$ 500,000,000
Interest rate	9.375%										9.375%
Senior Notes | Senior Notes Due 2028 | AmeriGas Partners And AmeriGas Finance Corp. | Maximum
Debt Instrument [Line Items]
Call premium	4.688%
Senior Notes | Senior Notes Due 2028 | AmeriGas Partners And AmeriGas Finance Corp. | Minimum
Debt Instrument [Line Items]
Call premium	0.00%
Senior Notes | AmeriGas Partners Senior Notes | AmeriGas Partners And AmeriGas Finance Corp.
Debt Instrument [Line Items]
Principal amount	$ 675,000,000										$ 675,000,000
Interest rate	5.625%										5.625%
Repayment of debt	$ 150,000,000
Loss on extinguishments of debt										$ (9,000,000)
Line of Credit | UGI International Credit Facilities Agreement | Unsecured Debt
Debt Instrument [Line Items]
Principal amount | €					€ 300,000,000
Debt term					5 years
Line of Credit | UGI International Credit Facilities Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity | €					€ 500,000,000
Line of Credit | UGI International Credit Facilities Agreement | Revolving Credit Facility | Euro Interbank Offered Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate					3.35%
Line of Credit | UGI International Credit Facilities Agreement | Revolving Credit Facility | Euro Interbank Offered Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate					1.70%
Line of Credit | UGI International Credit Facilities Agreement | Bridge Loan
Debt Instrument [Line Items]
Maximum borrowing capacity | €					€ 100,000,000
Consolidated net leverage ratio					3.85
Line of Credit | UGI International Credit Facilities Agreement | Bridge Loan | Maximum
Debt Instrument [Line Items]
Consolidated net leverage ratio					4.25
Line of Credit | UGI International Credit Facilities Agreement | Bridge Loan | Daily Non-cumulative Compounded Reference Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate					3.35%
Line of Credit | UGI International Credit Facilities Agreement | Bridge Loan | Daily Non-cumulative Compounded Reference Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate					1.35%
Line of Credit | UGI Energy Services Credit Agreement | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate		0.10%
Line of Credit | Energy Services Term Loan Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount							$ 800,000,000
Fixed rate				4.53%
Increase to limit							125,000,000
Quarterly installments							$ 2,000,000
Settlement of Energy Services interest rate swap						$ 32,000,000
Line of Credit | Energy Services Term Loan Credit Agreement | Revolving Credit Facility | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate							3.25%
Line of Credit | Energy Services Term Loan Credit Agreement | Revolving Credit Facility | SOFR adjustment rate
Debt Instrument [Line Items]
Basis spread on variable rate							0.10%
Line of Credit | Energy Services Term Loan Credit Agreement | Revolving Credit Facility | SOFR base rate
Debt Instrument [Line Items]
Basis spread on variable rate							2.25%
Line of Credit | UGI Utilities Credit Agreement | Utilities | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 425,000,000
Line of Credit | UGI Utilities Credit Agreement | Utilities | Revolving Credit Facility | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate								0.10%
Line of Credit | Mountaineer Credit Agreement | Mountaineer | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity									$ 150,000,000
Option to increase capacity									$ 250,000,000
Line of Credit | Mountaineer Credit Agreement | Mountaineer | Revolving Credit Facility | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate									1.00%
Line of Credit | Mountaineer Credit Agreement | Mountaineer | Revolving Credit Facility | SOFR | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate									2.25%
Line of Credit | Mountaineer Credit Agreement | Mountaineer | Revolving Credit Facility | SOFR | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate									1.00%
Line of Credit | Mountaineer Credit Agreement | Mountaineer | Revolving Credit Facility | Federal Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate									0.50%
Line of Credit | Mountaineer Credit Agreement | Mountaineer | Revolving Credit Facility | Base Rate Margin | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate									1.25%
Line of Credit | Mountaineer Credit Agreement | Mountaineer | Revolving Credit Facility | Base Rate Margin | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate									0.00%
Line of Credit | Mountaineer Credit Agreement | Mountaineer | Revolving Credit Facility | One-Month Interest Period (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate									0.10%
Line of Credit | Mountaineer Credit Agreement | Mountaineer | Revolving Credit Facility | Three-Month Interest Period (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate									0.15%
Line of Credit | Mountaineer Credit Agreement | Mountaineer | Revolving Credit Facility | Six-Month Interest Period (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate									0.25%
Line of Credit | Mountaineer Credit Agreement | Mountaineer | Letters of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity									$ 20,000,000
Line of Credit | UGI Corporation Credit Agreement | Revolving Credit Facility | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate		0.10%