Financial Highlights - Ratios to Average Limited Partners' Capital (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Class A Redeemable Units [Member]
Ratios to Average Limited Partners' Capital:
Net investment income (loss)	1.80%	0.50%	1.10%	0.00%
Operating expenses	3.20%	3.20%	3.30%	3.20%
Incentive fees	(0.50%)	0.40%	0.00%	0.50%
Total expenses	2.70%	3.60%	3.30%	3.70%
Total return:
Total return before incentive fees	(10.50%)	4.30%	1.90%	0.70%
Incentive fees	0.50%	(0.40%)	0.00%	(0.50%)
Total return after incentive fees	(10.00%)	3.90%	1.90%	0.20%
Class D Redeemable Units [Member]
Ratios to Average Limited Partners' Capital:
Net investment income (loss)	1.80%	0.50%	1.10%	0.00%
Operating expenses	3.20%	3.20%	3.30%	3.30%
Incentive fees	(0.50%)	0.40%	0.00%	0.50%
Total expenses	2.70%	3.60%	3.30%	3.80%
Total return:
Total return before incentive fees	(10.50%)	4.30%	1.90%	0.70%
Incentive fees	0.50%	(0.40%)	0.00%	(0.50%)
Total return after incentive fees	(10.00%)	3.90%	1.90%	0.20%
Class Z Redeemable Units [Member]
Ratios to Average Limited Partners' Capital:
Net investment income (loss)	2.50%	1.30%	1.90%	0.80%
Operating expenses	2.50%	2.40%	2.60%	2.50%
Incentive fees	(0.50%)	0.40%	0.00%	0.50%
Total expenses	2.00%	2.80%	2.60%	3.00%
Total return:
Total return before incentive fees	(10.30%)	4.50%	2.50%	1.30%
Incentive fees	0.50%	(0.40%)	0.00%	(0.60%)
Total return after incentive fees	(9.80%)	4.10%	2.50%	0.70%