Commitments and Contingencies - Additional Information (Detail) - USD ($) shares in Millions		3 Months Ended
	Oct. 01, 2024	Mar. 31, 2025
Loss Contingencies [Line Items]
Investment commitments		$ 1,200,000,000
Amount of securities on loan subject to indemnification		316,000,000,000
Collateral for indemnified securities		334,000,000,000
Fair value of indemnified securities		0
Global Infrastructure Management, LLC [Member]
Loss Contingencies [Line Items]
Contingent consideration at fair value		4,400,000,000
Fair value of deferred stock		$ 4,300,000,000
Global Infrastructure Management, LLC [Member] | First contingent payment [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Contingent payments	4.0	4.0
Global Infrastructure Management, LLC [Member] | First contingent payment [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Contingent payments	5.2	5.2