Other Intangible Assets (Details) - USD ($) $ in Millions		12 Months Ended
	Mar. 18, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		$ 9,561	$ 9,560
Finite-Lived Intangible Assets, Accumulated Amortization		$ (2,117)	(1,789)
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		30 years
Amortization of Intangible Assets		$ 328	$ 324	$ 333
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		328
Finite-Lived Intangible Assets, Amortization Expense, Year Two		328
Finite-Lived Intangible Assets, Amortization Expense, Year Three		328
Finite-Lived Intangible Assets, Amortization Expense, Year Four		328
Finite-Lived Intangible Assets, Amortization Expense, Year Five		$ 328
Utica East Ohio Midstream, LLC Acquisition [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	20 years
Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension	10 years