Financial Instruments, Hedging Activities and Fair Value Measurements (Fair Value Additional Information) (Detail) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Finance lease liability	$ 11,000,000
Foreign Currency Contract, Asset, Fair Value Disclosure		$ 36,000,000
Long-term debt	5,031,000,000	5,000,000,000
Long-term debt (excluding capital lease obligations), fair values	5,363,000,000	5,101,000,000
Capital lease obligations		12,000,000
Short-term Debt	10,000,000	4,000,000
Noncontrolling Interest in Joint Ventures	$ 0	$ 40,000,000

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying amount of the equity interests owned by noncontrolling shareholders, partners, or other equity holders in joint ventures included in the entity's consolidated financial statements.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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