Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Fair Value Measurements [Line Items]
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss)	$ (208)	$ (545)	$ (546)	$ (800)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	$ 325	$ 780	$ 889	$ 1,400
Weighted Average [Member] | Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Inventory Related Payables [Member]
Fair Value Measurements [Line Items]
Basis	42.70%		42.70%		33.20%
Weighted Average [Member] | Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Inventories Carried At Market [Member]
Fair Value Measurements [Line Items]
Basis	39.10%		39.10%		25.00%