Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Mar. 31, 2024

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income, Net of Tax

The tables below present changes in AOCI, net of tax:

Three Months Ended March 31, 2024	Postretirement Benefit Plans		Derivative Instruments		Foreign Currency		Total
AOCI — December 31, 2023	$	17	$	1	$	(250)	$	(232)
Other comprehensive income (loss) before reclassification adjustments	—		12		(24)		(12)
Amounts reclassified from AOCI	(1)		(9)		—		(10)
Other comprehensive (loss) income attributable to UGI	(1)		3		(24)		(22)
AOCI — March 31, 2024	$	16	$	4	$	(274)	$	(254)
Three Months Ended March 31, 2023	Postretirement Benefit Plans		Derivative Instruments		Foreign Currency		Total
AOCI — December 31, 2022	$	14	$	35	$	(280)	$	(231)
Other comprehensive (loss) income before reclassification adjustments	—		(15)		10		(5)
Amounts reclassified from AOCI	—		(5)		—		(5)
Other comprehensive (loss) income attributable to UGI	—		(20)		10		(10)
AOCI — March 31, 2023	$	14	$	15	$	(270)	$	(241)
Six Months Ended March 31, 2024	Postretirement Benefit Plans		Derivative Instruments		Foreign Currency		Total
AOCI — September 30, 2023	$	17	$	26	$	(299)	$	(256)
Other comprehensive (loss) income before reclassification adjustments	—		(3)		25		22
Amounts reclassified from AOCI	(1)		(19)		—		(20)
Other comprehensive (loss) income attributable to UGI	(1)		(22)		25		2
AOCI — March 31, 2024	$	16	$	4	$	(274)	$	(254)
Six Months Ended March 31, 2023	Postretirement Benefit Plans		Derivative Instruments		Foreign Currency		Total
AOCI — September 30, 2022	$	14	$	37	$	(431)	$	(380)
Other comprehensive (loss) income before reclassification adjustments	—		(12)		161		149
Amounts reclassified from AOCI	—		(10)		—		(10)
Other comprehensive (loss) income attributable to UGI	—		(22)		161		139
AOCI — March 31, 2023	$	14	$	15	$	(270)	$	(241)