Equity Method Investments (Whistler Joint Venture Transaction) (Details) - USD ($) $ in Millions		12 Months Ended
	May 29, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	May 28, 2024
Schedule of Equity Method Investments [Line Items]
Proceeds from equity method investment, distribution, return of capital		$ 161	$ 275	$ 515
WPC Parent, LLC
Schedule of Equity Method Investments [Line Items]
Gain on disposition of stock in equity method investee	$ 151
Proceeds from equity method investment, distribution, return of capital	$ 134
WPC Parent, LLC | MPLX
Schedule of Equity Method Investments [Line Items]
Equity method investments, ownership percentage	30.40%
WPC Parent, LLC | Enbridge Inc.
Schedule of Equity Method Investments [Line Items]
Equity method investments, ownership percentage	19.00%
Whistler Pipeline LLC | MPLX
Schedule of Equity Method Investments [Line Items]
Equity method investments, ownership percentage					37.50%