Guarantees and Contingencies (Detail) $ in Millions	6 Months Ended
Jun. 30, 2023 USD ($) case
Loss Contingencies [Line Items]
Loss contingency accrual	$ 116
MTBE Cases
Loss Contingencies [Line Items]
Total number of remaining active cases filed \| case	2
Gowanus Canal Superfund Site
Loss Contingencies [Line Items]
Estimated remediation cost	$ 506

Total anticipated costs associated with remediation, site restoration, postclosure, monitoring commitments, or other exit costs that may occur on the sale, disposal, or abandonment of a particular property resulting from unanticipated contamination of the assets.

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