Derivative Instruments and Hedging Activities (Tables)

6 Months Ended

Mar. 31, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts Related to Open Derivative Contracts

The following table summarizes by derivative type the gross notional amounts related to open derivative contracts at March 31, 2022, September 30, 2021 and March 31, 2021, and the final settlement dates of the Company's open derivative contracts as of March 31, 2022, excluding those derivatives that qualified for the NPNS exception:

			Notional Amounts (in millions)
Type	Units	Settlements Extending Through	March 31, 2022		September 30, 2021		March 31, 2021
Commodity Price Risk:
Regulated Utility Operations
PA Gas Utility NYMEX natural gas futures and option contracts	Dekatherms	February 2023	11		20		12
Non-utility Operations
LPG swaps	Gallons	September 2024	622		708		557
Natural gas futures, forward, basis swap, options and pipeline contracts	Dekatherms	March 2026	346		355		338
Electricity forward and futures contracts	Kilowatt hours	January 2026	3,098		4,302		4,773
Interest Rate Risk:
Interest rate swaps	Euro	October 2022	€	300	€	300	€	300
Interest rate swaps	USD	September 2024	$	1,414	$	1,421	$	1,302
Foreign Currency Exchange Rate Risk:
Forward foreign currency exchange contracts	USD	September 2024	$	274	$	509	$	384
Net investment hedge forward foreign exchange contracts	Euro	December 2026	€	486	€	173	€	173

Schedule of Derivative Assets, Liabilities and Effects of Offsetting

The following table presents the Company’s derivative assets and liabilities by type, as well as the effects of offsetting:

	March 31, 2022		September 30, 2021		March 31, 2021
Derivative assets:
Derivatives designated as hedging instruments:
Foreign currency contracts	$	18	$	20	$	16
Interest rate contracts	31		—		—
	49		20		16
Derivatives subject to PGC and DS mechanisms:
Commodity contracts	38		58		2
Derivatives not designated as hedging instruments:
Commodity contracts	1,931		1,591		233
Foreign currency contracts	17		18		9
	1,948		1,609		242
Total derivative assets — gross	2,035		1,687		260
Gross amounts offset in the balance sheet	(215)		(216)		(35)
Cash collateral received	(603)		(468)		(37)
Total derivative assets — net	$	1,217	$	1,003	$	188
Derivative liabilities:
Derivatives designated as hedging instruments:
Interest rate contracts	$	(1)	$	(29)	$	(39)
Derivatives subject to PGC and DS mechanisms:
Commodity contracts	(17)		(23)		(1)
Derivatives not designated as hedging instruments:
Commodity contracts	(304)		(257)		(71)
Foreign currency contracts	(2)		(8)		(12)
	(306)		(265)		(83)
Total derivative liabilities — gross	(324)		(317)		(123)
Gross amounts offset in the balance sheet	215		216		35
Cash collateral pledged	—		3		—
Total derivative liabilities — net	$	(109)	$	(98)	$	(88)

Effects of Derivative Instruments on Condensed Consolidated Statements of Income and Changes in AOCI

The following tables provide information on the effects of derivative instruments on the Condensed Consolidated Statements of Income and changes in AOCI:

Three Months Ended March 31,:
	Gain Recognized in AOCI				Loss Reclassified from AOCI into Income				Location of Loss Reclassified from AOCI into Income
Cash Flow Hedges:	2022		2021		2022		2021
Interest rate contracts	$	36	$	6	$	(7)	$	(6)	Interest expense
Net Investment Hedges:
Foreign currency contracts	$	11	$	7
	Gain (Loss) Recognized in Income
Derivatives Not Designated as Hedging Instruments:	2022		2021		Location of Gain (Loss) Recognized in Income
Commodity contracts	$	(7)	$	(2)	Revenues
Commodity contracts	599		135		Cost of sales
Commodity contracts	—		(2)		Operating and administrative expenses
Foreign currency contracts	7		17		Other non-operating income (expense), net
Total	$	599	$	148
Six Months Ended March 31,:
	Gain (Loss) Recognized in AOCI				Loss Reclassified from AOCI into Income				Location of Loss Reclassified from AOCI into Income
Cash Flow Hedges:	2022		2021		2022		2021
Interest rate contracts	$	48	$	6	$	(13)	$	(13)	Interest expense
Net Investment Hedges:
Foreign currency contracts	$	11	$	(1)
	Gain (Loss) Recognized in Income
Derivatives Not Designated as Hedging Instruments:	2022		2021		Location of Gain (Loss) Recognized in Income
Commodity contracts	$	1	$	1	Revenues
Commodity contracts	326		238		Cost of sales
Commodity contracts	—		5		Other operating income, net
Foreign currency contracts	15		(3)		Other non-operating income (expense), net
Total	$	342	$	241