Offsetting Assets and Liabilities - Schedule of Partnership's Securities Purchased Under Agreement to Resell (Detail) - USD ($) $ in Millions	Jun. 28, 2024	Dec. 31, 2023
Offsetting Securities Purchased under Agreements to Resell [Abstract]
Securities purchased under agreements to resell, Gross amounts of recognized assets	$ 524	$ 1,139
Securities purchased under agreements to resell, Gross amounts offset in the Consolidated Statements of Financial Condition	0	0
Securities purchased under agreements to resell, Net amounts presented in the Consolidated Statements of Financial Condition	524	1,139
Securities purchased under agreements to resell, Gross amounts not offset in the Consolidated Statements of Financial Condition, Financial instruments	0	0
Securities purchased under agreements to resell, Gross amounts not offset in the Consolidated Statements of Financial Condition, Securities collateral	(524)	(1,139)
Securities purchased under agreements to resell, Net amount	$ 0	$ 0