Variable Interest Entities (Detail) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Variable Interest Entity
Carrying value of debt	$ 24,020	$ 23,900
Assets	45,722	44,567
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity
Assets	135	128
Low income housing investments [Member] \| Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity
Aggregate investment balance	660	707
Carrying value of debt	640	670
Trust For Final Capping, Closure, Post-closure Or Environmental Remediation Obligations [Member] \| Variable Interest Entity, Not Primary Beneficiary [Member]
Variable Interest Entity
Aggregate investment balance	$ 117	$ 111

Amount of asset recognized for present right to economic benefit.

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+ Details

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References + Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details