Income Taxes (Net Deferred Income Tax Assets and Liabilities) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Examination [Line Items]
Employee benefits	$ 275	$ 386
Contingent and accrued liabilities	67	74
Operating loss and other carry-forwards	218	278
Operating lease liabilities	203	215
Research and development amortization	149	68
Other	168	121
Valuation allowance	182	172
Deferred tax assets, net of valuation allowance	898	970
Property	223	278
Intangibles	720	814
Employee benefits	81	75
Operating lease right-of-use assets	206	216
Other	74	36
Deferred tax liabilities, gross	1,304	1,419
Deferred tax liabilities, net	406	449
Net operating loss carryforwards	150	183
Income tax credit carryforwards	89	115
Income tax, potential U.S. tax cost for repatriation of foreign earnings	101
Deferred income tax assets related to
Employee benefits	275	386
Contingent and accrued liabilities	67	74
Operating loss and other carry-forwards	218	278
Operating lease liabilities	203	215
Research and development amortization	149	68
Other	168	121
Valuation allowance	(182)	(172)
Total	898	970
Deferred income tax liabilities related to
Property	223	278
Intangibles	720	814
Employee benefits	81	75
Operating lease right-of-use assets	206	216
Other	74	36
Total	1,304	1,419
Deferred income tax liabilities – net	$ (406)	(449)
Minimum
Income Tax Examination [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2023
Tax Credit Carryforward, Expiration Date	Dec. 31, 2023
Maximum
Income Tax Examination [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2042
Tax Credit Carryforward, Expiration Date	Dec. 31, 2042
Net Operating Loss, Indefinite Life
Income Tax Examination [Line Items]
Net operating loss carryforwards	$ 84	106
Net Operating Loss, Expiring Within 20 Years
Income Tax Examination [Line Items]
Net operating loss carryforwards	$ 66	$ 77