Income Taxes (Net Deferred Income Tax Assets and Liabilities) (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Income Tax Examination [Line Items]
Employee benefits	$ 215	$ 266
Contingent and accrued liabilities	105	61
Operating loss and other carry-forwards	389	270
Operating lease liabilities	144	187
Research and development amortization	259	213
Other	280	198
Valuation allowance	327	240
Deferred tax assets, net of valuation allowance	1,065	955
Property	268	220
Intangibles	607	679
Employee benefits	39	47
Operating lease right-of-use assets	148	194
Other	105	43
Deferred tax liabilities, gross	1,167	1,183
Deferred tax liabilities, net	102	228
Net operating loss carryforwards	235	158
Income tax credit carryforwards	112	108
Income tax, potential U.S. tax cost for repatriation of foreign earnings	142
Deferred income tax assets related to
Employee benefits	215	266
Contingent and accrued liabilities	105	61
Operating loss and other carry-forwards	389	270
Operating lease liabilities	144	187
Research and development amortization	259	213
Other	280	198
Valuation allowance	(327)	(240)
Total	1,065	955
Deferred income tax liabilities related to
Property	268	220
Intangibles	607	679
Employee benefits	39	47
Operating lease right-of-use assets	148	194
Other	105	43
Total	1,167	1,183
Deferred income tax liabilities – net	(102)	(228)
Net Operating Loss, Indefinite Life
Income Tax Examination [Line Items]
Net operating loss carryforwards	85	86
Net Operating Loss, Expiring Within 20 Years
Income Tax Examination [Line Items]
Net operating loss carryforwards	$ 150	$ 72