Financial Highlights - Ratios to Average Partners' Capital and Other Information (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class A Series 1 [Member]
Per unit operating performance:
Beginning net asset value	$ 4,040.79	$ 3,773.02	$ 3,379.30
Income (loss) from investment operations:
Net investment income (loss)	(232.93)	(175.46)	(113.84)
Net realized and change in unrealized gains (losses) on trading activities	594.97	443.23	507.56
Total income (loss) from investment operations	362.04	267.77	393.72
Ending net asset value	$ 4,402.83	$ 4,040.79	$ 3,773.02
Ratios to average partners' capital:
Expenses other than incentive fees	5.24%	5.21%	5.21%
Total expenses	5.24%	5.21%	5.21%
Net investment income (loss)	(5.17%)	(4.61%)	(3.15%)
Total return2:
Total return before incentive fees	8.96%	7.10%	11.65%
Total return after incentive fees	8.96%	7.10%	11.65%
Class A Series 2 [Member]
Per unit operating performance:
Beginning net asset value	$ 4,682.16	$ 4,317.43	$ 3,818.72
Income (loss) from investment operations:
Net investment income (loss)	(204.03)	(144.61)	(72.65)
Net realized and change in unrealized gains (losses) on trading activities	687.89	509.34	571.36
Total income (loss) from investment operations	483.86	364.73	498.71
Ending net asset value	$ 5,166.02	$ 4,682.16	$ 4,317.43
Ratios to average partners' capital:
Expenses other than incentive fees	3.95%	3.85%	4.25%
Total expenses	3.95%	3.85%	4.25%
Net investment income (loss)	(3.88%)	(3.30%)	(1.80%)
Total return2:
Total return before incentive fees	10.33%	8.45%	13.06%
Total return after incentive fees	10.33%	8.45%	13.06%
Class B Series 1 [Member]
Per unit operating performance:
Beginning net asset value	$ 4,040.61	$ 3,772.86	$ 3,379.15
Income (loss) from investment operations:
Net investment income (loss)	(232.59)	(174.74)	(114.01)
Net realized and change in unrealized gains (losses) on trading activities	594.62	442.49	507.72
Total income (loss) from investment operations	362.03	267.75	393.71
Ending net asset value	$ 4,402.64	$ 4,040.61	$ 3,772.86
Ratios to average partners' capital:
Expenses other than incentive fees	5.23%	5.18%	5.23%
Total expenses	5.23%	5.18%	5.23%
Net investment income (loss)	(5.16%)	(4.59%)	(3.16%)
Total return2:
Total return before incentive fees	8.96%	7.10%	11.65%
Total return after incentive fees	8.96%	7.10%	11.65%
Man-AHL Diversified Trading Company L.P. [Member]
Per unit operating performance:
Beginning net asset value	$ 19,823.33	$ 17,723.52	$ 15,203.61
Income (loss) from investment operations:
Net investment income (loss)	(146.33)	(36.79)	210.56
Net realized and change in unrealized gains (losses) on trading activities	2,899.55	2,136.60	2,309.35
Total income (loss) from investment operations	2,753.22	2,099.81	2,519.91
Ending net asset value	$ 22,576.55	$ 19,823.33	$ 17,723.52
Ratios to average partners' capital:
Total expenses	0.71%	0.77%	0.76%
Net investment income (loss)	(0.65%)	(0.20%)	1.27%
Total return	13.89%	11.85%	16.57%