Fair Value Measurements (Tables)

9 Months Ended

Jun. 30, 2023

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table presents, on a gross basis, our financial assets and liabilities, including both current and noncurrent portions, that are measured at fair value on a recurring basis within the fair value hierarchy:

	Asset (Liability)
	Level 1		Level 2		Level 3		Total
June 30, 2023:
Derivative instruments:
Assets:
Commodity contracts (c)	$	146	$	111	$	—	$	257
Foreign currency contracts	$	—	$	18	$	—	$	18
Interest rate contracts	$	—	$	30	$	—	$	30
Liabilities:
Commodity contracts (c)	$	(242)	$	(224)	$	—	$	(466)
Foreign currency contracts	$	—	$	(4)	$	—	$	(4)
Interest rate contracts	$	—	$	(4)	$	—	$	(4)
Non-qualified supplemental postretirement grantor trust investments (a)	$	40	$	—	$	—	$	40
September 30, 2022:
Derivative instruments:
Assets:
Commodity contracts (b)	$	938	$	1,268	$	27	$	2,233
Foreign currency contracts	$	—	$	119	$	—	$	119
Interest rate contracts	$	—	$	66	$	—	$	66
Liabilities:
Commodity contracts (b)	$	(377)	$	(136)	$	—	$	(513)
Foreign currency contracts	$	—	$	(2)	$	—	$	(2)
Non-qualified supplemental postretirement grantor trust investments (a)	$	43	$	—	$	—	$	43
June 30, 2022:
Derivative instruments:
Assets:
Commodity contracts	$	816	$	1,149	$	—	$	1,965
Foreign currency contracts	$	—	$	59	$	—	$	59
Interest rate contracts	$	—	$	44	$	—	$	44
Liabilities:
Commodity contracts	$	(324)	$	(37)	$	—	$	(361)
Foreign currency contracts	$	—	$	(2)	$	—	$	(2)
Non-qualified supplemental postretirement grantor trust investments (a)	$	46	$	—	$	—	$	46

(a)Consists primarily of mutual fund investments held in grantor trusts associated with non-qualified supplemental retirement plans.

(b)Includes derivative assets and liabilities associated with the October 2022 sale of the U.K. energy marketing business classified as held for sale (see Note 5).

(c)Includes derivative assets and liabilities associated with certain UGI International energy marketing businesses classified as held for sale (see Note 5).

Schedule of Carrying Amount and Estimated Fair Value of Long-term Debt

The carrying amounts and estimated fair values of our long-term debt (including current maturities but excluding unamortized debt issuance costs) were as follows:

	June 30, 2023		September 30, 2022		June 30, 2022
Carrying amount	$	6,682	$	6,665	$	6,483
Estimated fair value	$	6,318	$	6,189	$	6,145