Offsetting Assets and Liabilities - Schedule of Partnership's Securities Purchased Under Agreement to Resell (Detail) - USD ($) $ in Millions	Mar. 25, 2016	Dec. 31, 2015
Offsetting Securities Purchased Under Agreements To Resell [Abstract]
Securities purchased under agreements to resell, Gross amounts of recognized assets	$ 589	$ 843
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	589	843
Securities purchased under agreements to resell, gross amounts not offset, financial instruments	0	0
Securities purchased under agreements to resell, gross amounts not offset, securities collateral	(589)	(843)
Securities purchased under agreements to resell, Net amount	$ 0	$ 0