Income Taxes (Components Of Net Deferred Income Tax Liability (Asset) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred income tax liabilities:
Property, plant and equipment basis differences	$ 1,059	$ 859
Intangibles	178	140
Deferred revenue/expense	(7)	(3)
Other, net	47	46
Gross deferred income tax liability	1,277	1,042
Deferred income tax assets:
Pension liability	123	212
Tax operating loss carryforward	306	185
Employee benefits	91	151
Interest expense deduction limitation carryforward	112
Accrued expenses	80	76
Lease obligations	96	75
Tax credit	14	4
Allowance for doubtful accounts	13	14
Other, net	25	30
Gross deferred income tax asset	860	747
Less: Valuation allowance	(141)	(92)
Net deferred income tax asset	719	655
Net deferred income tax liability	$ 558	$ 387