Goodwill and Intangibles (Changes In Carrying Amount Of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Line Items]
Beginning balance	$ 8,244	$ 8,244
Impairments	0	0
Ending balance	8,244	8,244
Refining & Marketing
Goodwill [Line Items]
Beginning balance	561	561
Impairments	0	0
Ending balance	561	561
Midstream
Goodwill [Line Items]
Beginning balance	7,683	7,683
Impairments	0	0
Ending balance	$ 7,683	$ 7,683