Debt (Details)					1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 08, 2024 USD ($)	Jun. 30, 2024 USD ($) $ / shares	Jun. 28, 2024	Apr. 30, 2024 USD ($)	Jun. 30, 2024 USD ($) $ / shares	Jun. 30, 2024 USD ($) $ / shares	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) $ / shares	Jun. 30, 2023 USD ($)	May 31, 2024 USD ($)	Mar. 31, 2024 USD ($)	Nov. 30, 2023 USD ($)	Nov. 09, 2023 USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of notes								$ 1,196,000,000	$ 1,867,000,000
Cash contribution					$ 315,000,000
Loss on extinguishments of debt						$ 7,000,000	$ 9,000,000	$ 7,000,000	$ 9,000,000
Senior Notes | Senior Notes Due 2030 | Utilities
Debt Instrument [Line Items]
Principal amount												$ 25,000,000
Interest rate												6.02%
Conversion price (in dollars per share) | $ / shares		$ 27.60			$ 27.60	$ 27.60		$ 27.60
Initial conversion rate					0.0362319
Senior Notes | Senior Notes Due 2033 | Utilities
Debt Instrument [Line Items]
Principal amount												$ 150,000,000
Interest rate												6.10%
Senior Notes | Senior Notes Due 2053 | Utilities
Debt Instrument [Line Items]
Principal amount												$ 75,000,000
Interest rate												6.40%
Senior Notes | AmeriGas Partners Senior Notes | AmeriGas Partners And AmeriGas Finance Corp.
Debt Instrument [Line Items]
Principal amount		$ 218,000,000			$ 218,000,000	$ 218,000,000		$ 218,000,000
Interest rate		5.50%			5.50%	5.50%		5.50%
Repurchase amount		$ 475,000,000			$ 475,000,000	$ 475,000,000		$ 475,000,000
Repayment of debt					315,000,000
Aggregate principal amount											$ 38,000,000
Long-term debt, gross		$ 1,887,000,000			$ 1,887,000,000	$ 1,887,000,000		$ 1,887,000,000
Senior Notes | AmeriGas Partners Senior Notes | AmeriGas Partners
Debt Instrument [Line Items]
Interest rate		5.625%			5.625%	5.625%		5.625%
Aggregate principal balance					$ 675,000,000
Loss on extinguishments of debt							$ 9,000,000
Senior Notes | 5.50 Percent Senior Notes | AmeriGas Partners And AmeriGas Finance Corp.
Debt Instrument [Line Items]
Interest rate											5.50%
Repurchase amount											$ 7,000,000
Senior Notes | 5.875 Percent Senior Notes | AmeriGas Partners And AmeriGas Finance Corp.
Debt Instrument [Line Items]
Interest rate											5.875%
Repurchase amount											$ 11,000,000
Senior Notes | 5.75 Percent Senior Notes | AmeriGas Partners And AmeriGas Finance Corp.
Debt Instrument [Line Items]
Interest rate											5.75%
Repurchase amount											$ 13,000,000
Senior Notes | 9.375 Percent Senior Notes | AmeriGas Partners And AmeriGas Finance Corp.
Debt Instrument [Line Items]
Interest rate											9.375%
Repurchase amount											$ 7,000,000
Senior Notes | UGI Corporation Senior Notes
Debt Instrument [Line Items]
Principal amount		$ 700,000,000			$ 700,000,000	$ 700,000,000		$ 700,000,000
Interest rate		5.00%			5.00%	5.00%		5.00%
Proceeds from issuance of notes		$ 682,000,000
Senior Notes | UGI Corporation Senior Notes | Conversion period one
Debt Instrument [Line Items]
Conversion price percent					130.00%
Conversion price (in dollars per share) | $ / shares		$ 27.60			$ 27.60	$ 27.60		$ 27.60
Senior Notes | UGI Corporation Senior Notes | Conversion period two
Debt Instrument [Line Items]
Conversion price percent		98.00%
Credit Agreement | UGI Utilities 2023 Credit Agreement | Utilities | Revolver
Debt Instrument [Line Items]
Maximum borrowing capacity													$ 375,000,000
Increase to limit													125,000,000
Credit Agreement | UGI Utilities 2023 Credit Agreement | Utilities | Letters of credit
Debt Instrument [Line Items]
Maximum borrowing capacity													50,000,000
Credit Agreement | UGI Utilities 2023 Credit Agreement | Utilities | Swingline loans
Debt Instrument [Line Items]
Maximum borrowing capacity													$ 38,000,000
Credit Agreement | Energy Services Term Loan Credit Agreement | Revolver | SOFR
Debt Instrument [Line Items]
Basis spread on variable rate			2.50%
Credit Agreement | Energy Services Term Loan Credit Agreement | Revolver | SOFR base rate
Debt Instrument [Line Items]
Basis spread on variable rate			1.50%
Credit Agreement | Energy Services Credit Agreement | Revolver
Debt Instrument [Line Items]
Maximum borrowing capacity										$ 300,000,000
Credit Agreement | Energy Services Credit Agreement | Letters of credit
Debt Instrument [Line Items]
Maximum borrowing capacity										$ 50,000,000
Credit Agreement | UGI International 2023 Credit Agreement | Revolver
Debt Instrument [Line Items]
Key performance indicators adjustment percentage		0.05%
Credit Agreement | AmeriGas Senior Secured Revolving Credit Facility | Revolver | Subsequent event
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 200,000,000
Debt term	5 years
Maximum borrowing capacity, increase limit	$ 150,000,000
Credit Agreement | AmeriGas Senior Secured Revolving Credit Facility | Revolver | SOFR | Subsequent event | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
Credit Agreement | AmeriGas Senior Secured Revolving Credit Facility | Revolver | SOFR | Subsequent event | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Credit Agreement | AmeriGas Senior Secured Revolving Credit Facility | Revolver | SOFR base rate | Subsequent event | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.75%
Credit Agreement | AmeriGas Senior Secured Revolving Credit Facility | Revolver | SOFR base rate | Subsequent event | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.25%
Credit Agreement | AmeriGas Senior Secured Revolving Credit Facility | Letters of credit | Subsequent event
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 20,000,000
Credit Agreement | UGI Corporation Credit Facility Agreement | Revolver
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 300,000,000
Credit Agreement | UGI Corporation Credit Facility Agreement, Variable-Rate Term Loan 1
Debt Instrument [Line Items]
Principal amount				$ 215,000,000
Term loan interest rate				0.375%
Credit Agreement | UGI Corporation Credit Facility Agreement, Variable-Rate Term Loan 2
Debt Instrument [Line Items]
Principal amount				$ 300,000,000
Term loan interest rate				0.375%
Credit Agreement | UGI Corporation Credit Facility Agreement, Variable-Rate Term Loan 3
Debt Instrument [Line Items]
Principal amount				$ 250,000,000