Income Taxes (Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Employee benefits	$ 558	$ 549
Environmental remediation	81	89
Finance lease obligations	433	365
Operating lease liabilities	243	229
Net operating loss carryforwards	39	44
Tax credit carryforwards	22	10
Goodwill and other intangibles	75	71
Other	95	96
Total deferred tax assets	1,546	1,453
Valuation allowance	(51)	(28)
Total net deferred tax assets	1,495	1,425
Deferred tax liabilities:
Property, plant and equipment	2,584	2,684
Inventories	672	627
Investments in subsidiaries and affiliates	3,742	3,706
Right of use assets	246	230
Other	20	11
Total deferred tax liabilities	7,264	7,258
Net deferred tax liabilities	$ 5,769	$ 5,833