Fair Value Disclosures - Summary of Information Related to Bank Loans and Borrowings of Consolidated CLO Recorded within Investments and Borrowings of Consolidated VIEs Respectively for which Fair Value Option was Elected (Detail) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Fair Value Option Quantitative Disclosures [Line Items]
Aggregate principal amounts outstanding	$ 12,456
CLO Loans [Member]
Fair Value Option Quantitative Disclosures [Line Items]
Aggregate principal amounts outstanding	138	$ 156
Fair value	115	141
Aggregate unpaid principal balance in excess of (less than) fair value	23	15
CLO Borrowings [Member]
Fair Value Option Quantitative Disclosures [Line Items]
Aggregate principal amounts outstanding	122	146
Fair value	102	129
Aggregate unpaid principal balance in excess of (less than) fair value	$ 20	$ 17