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Regulatory Matters, Commitments, Contingencies And Environmental Liabilities Narrative (Details)			6 Months Ended		9 Months Ended
	Sep. 21, 2022 USD ($)	Aug. 01, 2020 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2023 USD ($) Rate	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Accrual for Environmental Loss Contingencies					$ 284,000,000		$ 282,000,000
Loss Contingency, Estimate of Possible Loss					200,000,000
Litigation Settlement, Expense					161,000,000
Payments for Environmental Liabilities					$ 23,000,000	$ 8,000,000
Interest Statutory Rate | Rate					12.00%
Proposed Civil Penalty
Payments for Legal Settlements					$ 20,000,000
Litigation Settlement, Expense					40,000,000
Settled Williams Littigation, without post-judgement interest
Litigation Settlement, Expense					617,000,000
Related To Deductibles
Loss Contingency Accrual, at Carrying Value					$ 947,000,000		$ 200,000,000
Sunoco, Inc. [Member]
Loss Contingency, Pending Claims, Number					2
Sunoco [Member]
Site Contingency, Number of Sites Needing Remediation					31
Culberson
Loss Contingency, Damages Sought, Value					$ 93,000,000
USAC [Member]
Loss Contingency, Estimate of Possible Loss					25,000,000
Williams Litigation [Member]
Loss Contingency, Damages Sought, Value				$ 1,480,000,000	410,000,000
Litigation Settlement, Expense	$ 601,000,000
Debt Instrument, Interest Rate, Stated Percentage	3.50%
Legal Fees					190,000,000
Cline Class Action | Additional Interest
Litigation Settlement Interest					23,000,000
Cline Class Action | Actual Damages
Litigation Settlement Interest					104,000,000
Cline Class Action | punitive damages
Litigation Settlement Interest					75,000,000
Cline Class Action | Actual Damages
Payments for Legal Settlements		$ 74,800,000	$ 80,700,000
Cline Class Action | punitive damages
Payments for Legal Settlements			$ 75,000,000
Massachusetts Attorney General
Legal Fees					$ 18,000,000

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