Transactions with Affiliates Related Party Transations (Details) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2022 USD ($)	Jun. 30, 2022 USD ($) employee	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) employee	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Related Party Transaction [Line Items]
Advances to affiliate		$ 2,010,313		$ 2,010,313		$ 1,669,368
Related party transaction, rate				1.21%
Interest income, related party		3,300		$ 3,500
Operating revenues, related party		22,600	$ 2,100	43,700	$ 4,700
Cost of natural gas sales, related party		$ 1,800	700	$ 7,200	4,100
Entity number of employees | employee		0		0
Expenses, related party		$ 87,400	75,700	$ 167,000	154,500
Reduction to operating expenses		2,100	$ 1,800	3,700	3,500
Cash distributions to parent				307,548	$ 231,370
Williams Companies Inc
Related Party Transaction [Line Items]
Advances to affiliate		$ 2,000,000		$ 2,000,000		$ 1,700,000
Subsequent Event
Related Party Transaction [Line Items]
Cash distributions to parent	$ 280,000