Income Taxes (Components Of Net Deferred Income Tax Liability (Asset) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred income tax liabilities:
Property, plant and equipment basis differences	$ 1,342	$ 1,059
Intangibles	184	178
Deferred revenue/expense	(8)	(7)
Other, net	45	47
Gross deferred income tax liability	1,563	1,277
Deferred income tax assets:
Pension liability	48	123
Tax operating loss carryforward	476	306
Employee benefits	83	91
Interest expense deduction limitation carryforward	260	112
Accrued expenses	80	80
Lease obligations	111	96
Tax credit	32	14
Allowance for doubtful accounts	11	13
Other, net	(1)	25
Gross deferred income tax asset	1,100	860
Less: Valuation allowance	(180)	(141)
Net deferred income tax asset	920	719
Net deferred income tax liability	$ 643	$ 558