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Derivative Instruments and Hedging Activities (Tables)
 3 Months Ended
Dec. 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 December 31, 2022, September 30, 2022 and December 31, 2021, and the final settlement dates of the Company's open derivative contracts as of December 31, 2022, but excluding those derivatives that qualified for the NPNS exception:
Notional Amounts
(in millions)
TypeUnitsSettlements Extending ThroughDecember 31, 2022September 30, 2022December 31, 2021
Commodity Price Risk:
Regulated Utility Operations
PA Gas Utility NYMEX natural gas futures and option contractsDekathermsSeptember 202315 19 14 
Non-utility Operations
LPG swapsGallonsSeptember 2025844 874 732 
Natural gas futures, forward, basis swap, options and pipeline contracts (a)DekathermsOctober 2027371 363 382 
Electricity forward and futures contractsKilowatt hoursDecember 20262,270 2,446 4,261 
Interest Rate Risk:
Interest rate swapsEuroN/A€— €300 €300 
Interest rate swapsUSDJune 2026$1,354 $1,358 $1,418 
Foreign Currency Exchange Rate Risk:
Forward foreign currency exchange contractsUSDAugust 2025$390 $465 $415 
Net investment hedge forward foreign exchange contractsEuroDecember 2026€331 €411 €486 
(a)September 30, 2022 includes amounts held-for-sale associated with the October 2022 sale of the U.K. energy marketing business (see Note 5).
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:
December 31,
2022		September 30,
2022		December 31,
2021
Derivative assets:
Derivatives designated as hedging instruments:  
Foreign currency contracts$11 $57 $10 
Interest rate contracts63 66 5 
74 123 15 
Derivatives subject to PGC and DS mechanisms:
Commodity contracts18 31 10 
Derivatives not designated as hedging instruments:  
Commodity contracts (a)656 2,202 1,112 
Foreign currency contracts24 62 19 
680 2,264 1,131 
Total derivative assets — gross772 2,418 1,156 
Gross amounts offset in the balance sheet(239)(295)(116)
Cash collateral received(108)(398)(205)
Total derivative assets — net$425 $1,725 $835 
Derivative liabilities:
Derivatives designated as hedging instruments:
Foreign currency contracts$— $— $(3)
Interest rate contracts— — (17)
— — (20)
Derivatives subject to PGC and DS mechanisms:
Commodity contracts(35)(26)(7)
Derivatives not designated as hedging instruments:
Commodity contracts (a)(414)(487)(171)
Foreign currency contracts(4)(2)(4)
(418)(489)(175)
Total derivative liabilities — gross(453)(515)(202)
Gross amounts offset in the balance sheet239 295 116 
Cash collateral pledged45 7 — 
Total derivative liabilities — net$(169)$(213)$(86)

(a)September 30, 2022 includes derivative assets and liabilities held-for-sale associated with the October 2022 sale of the U.K. energy marketing business (see Note 5).
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 December 31,:
Gain (Loss)
Recognized in
AOCI		Gain (Loss)
Reclassified from
AOCI into Income		Location of Gain (Loss) Reclassified from
AOCI into Income
Cash Flow Hedges:2022202120222021
Interest rate contracts$4 $12 $7 $(6)Interest expense
Net Investment Hedges:
Foreign currency contracts$(23)$— 
Gain (Loss)
Recognized in Income
Derivatives Not Designated as Hedging Instruments:20222021Location of Gain (Loss) Recognized in Income
Commodity contracts$4 $8 Revenues
Commodity contracts(1,326)(273)Cost of sales
Commodity contracts3 — Other operating income, net
Foreign currency contracts(32)8 Other non-operating (expense) income, net
Total$(1,351)$(257)