Deferred Cash Compensation Plans and Employee Benefit Plans - Components of Deferred Cash Compensation Expense (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred Compensation [Line Items]
Deferred cash compensation expense	$ 226	$ 224	$ 390
Investment Professional Deferred Compensation Program [Member]
Deferred Compensation [Line Items]
Deferred cash compensation expense	195	228	304
Voluntary Deferred Compensation Plan [Member]
Deferred Compensation [Line Items]
Deferred cash compensation expense	17	(18)	12
Deferred Compensation Plan Other [Member]
Deferred Compensation [Line Items]
Deferred cash compensation expense	$ 14	$ 14	$ 74

The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 710
-SubTopic 10
-Name Accounting Standards Codification
-Section 30
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483043/710-10-30-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-1

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration