Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Target Award to be Granted

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Period

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount, after tax, of expense for award under share-based payment arrangement.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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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.

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Equity-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Jan. 29, 2021	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award
Pre-tax equity-based compensation expense		$ 18	$ 8	$ 17
After tax equity-based compensation expense		$ 13	$ 6	$ 13
Weighted-average fair value of stock option granted under stock plans (in dollars per share)		$ 6.32	$ 4.17	$ 9.31
Options outstanding (in shares)		6,154,811
Options exercisable (in shares)		5,614,474
Weighted average exercise price (in dollars per share)		$ 43.51
UGI Stock Option Awards
Share-based Compensation Arrangement by Share-based Payment Award
Unrecognized compensation cost associated with unvested unit awards		$ 1
Weighted-average period of recognition for unvested unit awards		1 year 1 month 6 days
UGI Performance Units
Share-based Compensation Arrangement by Share-based Payment Award
Weighted-average fair value of stock option granted under stock plans (in dollars per share)		$ 30.26	$ 28.91	$ 44.62
UGI Performance Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Award performance period		0 years
Percentage of target award to be granted (as a percentage)		0.00%
UGI Performance Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Award performance period		3 years
Percentage of target award to be granted (as a percentage)		200.00%
UGI EPS Performance Unit
Share-based Compensation Arrangement by Share-based Payment Award
Unrecognized compensation cost associated with unvested unit awards		$ 21
Weighted-average period of recognition for unvested unit awards		1 year 9 months 18 days
UGI Unit awards outstanding (in shares)		1,515,989
Weighted average grant date fair value, outstanding (in dollars per share)		$ 31.69
UGI EPS Performance Unit \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Award performance period			0 years
Percentage of target award to be granted (as a percentage)			0.00%
UGI EPS Performance Unit \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Award performance period			3 years
Percentage of target award to be granted (as a percentage)			200.00%
2021 IAP \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Common Stock awards granted (up to) (in shares)	20,500,000
Expiration period	10 years
Number of common unit awards available for future grant (in shares)		13,473,660