v3.26.1
Derivative Instruments and Hedging Activities (Tables)
 9 Months Ended
Jun. 30, 2026
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 June 30, 2026, September 30, 2025 and June 30, 2025, and the final settlement dates of the Company's open derivative contracts as of June 30, 2026, but excluding those derivatives that qualified for the NPNS exception:
Notional Amounts
(in millions)
TypeUnitsSettlements Extending ThroughJune 30, 2026September 30, 2025June 30, 2025
Commodity Price Risk:
Regulated Utility Operations
PA Gas Utility NYMEX natural gas futures and option contractsDekathermsFebruary 202712 28 15 
Non-utility Operations
LPG swapsGallonsMay 2029401 608 536 
Natural gas futures, forward, basis swap, options and pipeline contractsDekathermsMarch 2030212 237 241 
Electricity forward and futures contracts Kilowatt hoursDecember 2029999 929 791 
Interest Rate Risk:
Interest rate swapsEuroJune 2027€200 €300 €300 
Interest rate swapsUSDSeptember 2028$1,585 $1,443 $1,446 
Foreign Currency Exchange Rate Risk:
Forward foreign currency exchange contractsUSDSeptember 2029$468 $500 $440 
Net investment hedge forward foreign exchange contractsEuroDecember 2026€106 €106 €106 
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:
June 30,
2026		September 30,
2025		June 30,
2025
Derivative assets:
Derivatives designated as hedging instruments:
Foreign currency contracts$6 $1 $— 
Interest rate contracts5 — 1 
11 1 1 
Derivatives subject to PGC and DS mechanisms:
Commodity contracts— 3 3 
Derivatives not designated as hedging instruments:
Commodity contracts93 93 110 
Foreign currency contracts8 — — 
101 93 110 
Total derivative assets — gross112 97 114 
Gross amounts offset in the balance sheet(68)(65)(77)
Cash collateral received(1)(2)(21)
Total derivative assets — net$43 $30 $16 
Derivative liabilities:
Derivatives designated as hedging instruments:
Interest rate contracts$(2)$(12)$(14)
Derivatives subject to PGC and DS mechanisms:
Commodity contracts(5)(8)(2)
Derivatives not designated as hedging instruments:
Commodity contracts(100)(125)(156)
Foreign currency contracts(4)(19)(25)
(104)(144)(181)
Total derivative liabilities — gross(111)(164)(197)
Gross amounts offset in the balance sheet68 65 77 
Cash collateral pledged— 19 38 
Total derivative liabilities — net$(43)$(80)$(82)
Schedule of 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 June 30,:
Gain (Loss)
Recognized in
AOCI		Gain (Loss)
Reclassified from
AOCI into Income		Location of Gain (Loss) Reclassified from
AOCI into Income
Cash Flow Hedges:2026202520262025
Interest rate contracts$10 $(2)$1 $2 Interest expense
Net Investment Hedges:
Foreign currency contracts$1 $(17)
Gain (Loss)
Recognized in Income
Derivatives Not Designated as Hedging Instruments:20262025Location of Gain (Loss) Recognized in Income
Commodity contracts$— $1 Revenues
Commodity contracts(86)(122)Cost of sales
Commodity contracts2 (1)Other operating expense (income), net
Foreign currency contracts6 (26)Other non-operating income (expense), net
Total$(78)$(148)
Nine Months Ended June 30,:
Gain (Loss)
Recognized in
AOCI		Gain (Loss)
Reclassified from
AOCI into Income		Location of Gain (Loss) Reclassified from
AOCI into Income
Cash Flow Hedges:2026202520262025
Interest rate contracts$22 $12 $5 $3 Interest expense
Net Investment Hedges:
Foreign currency contracts$5 $(10)
Gain (Loss)
Recognized in Income
Derivatives Not Designated as Hedging Instruments:20262025Location of Gain (Loss) Recognized in Income
Commodity contracts$— $(1)Revenues
Commodity contracts84 14 Cost of sales
Commodity contracts(1)(2)Other operating expense (income), net
Foreign currency contracts14 (10)Other non-operating income (expense), net
Total$97 $1