Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Jun. 30, 2021

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income

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

Three Months Ended June 30, 2021	Postretirement Benefit Plans		Derivative Instruments		Foreign Currency		Total
AOCI — March 31, 2021	$	(25)	$	(41)	$	(60)	$	(126)
Other comprehensive income before reclassification adjustments	—		—		16		16
Amounts reclassified from AOCI	—		5		—		5
Other comprehensive income attributable to UGI	—		5		16		21
AOCI — June 30, 2021	$	(25)	$	(36)	$	(44)	$	(105)
Three Months Ended June 30, 2020	Postretirement Benefit Plans		Derivative Instruments		Foreign Currency		Total
AOCI — March 31, 2020	$	(24)	$	(54)	$	(152)	$	(230)
Other comprehensive (loss) income before reclassification adjustments	—		(8)		28		20
Amounts reclassified from AOCI	—		5		—		5
Other comprehensive (loss) income attributable to UGI	—		(3)		28		25
AOCI — June 30, 2020	$	(24)	$	(57)	$	(124)	$	(205)

Nine Months Ended June 30, 2021	Postretirement Benefit Plans		Derivative Instruments		Foreign Currency		Total
AOCI — September 30, 2020	$	(26)	$	(54)	$	(67)	$	(147)
Other comprehensive income before reclassification adjustments	—		4		23		27
Amounts reclassified from AOCI	1		14		—		15
Other comprehensive income attributable to UGI	1		18		23		42
AOCI — June 30, 2021	$	(25)	$	(36)	$	(44)	$	(105)
Nine Months Ended June 30, 2020	Postretirement Benefit Plans		Derivative Instruments		Foreign Currency		Total
AOCI — September 30, 2019	$	(26)	$	(25)	$	(166)	$	(217)
Other comprehensive (loss) income before reclassification adjustments	—		(38)		42		4
Amounts reclassified from AOCI	2		6		—		8
Other comprehensive income (loss) attributable to UGI	2		(32)		42		12
AOCI — June 30, 2020	$	(24)	$	(57)	$	(124)	$	(205)