Financial Highlights - Schedule of Changes in Net Asset Value (Detail) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Class A Redeemable Units [Member]
Per Redeemable Unit Performance (for a unit outstanding throughout the period):
Net realized and unrealized gains (losses)	$ 74.75	$ 41.60	$ 87.60	$ 26.84
Net investment loss	(12.17)	(11.53)	(26.79)	(24.69)
Increase (decrease) for the period	(86.92)	30.07	(114.39)	2.15
Net asset value per Redeemable Unit, beginning of period	1,131.58	1,123.91	1,159.05	1,151.83
Net asset value per Redeemable Unit, end of period	1,044.66	1,153.98	1,044.66	1,153.98
Class Z Redeemable Units [Member]
Per Redeemable Unit Performance (for a unit outstanding throughout the period):
Net realized and unrealized gains (losses)	64.19	35.47	75.27	22.86
Net investment loss	(5.86)	(5.25)	(13.34)	(11.25)
Increase (decrease) for the period	(70.05)	30.22	(88.61)	11.61
Net asset value per Redeemable Unit, beginning of period	971.32	945.42	989.88	964.03
Net asset value per Redeemable Unit, end of period	$ 901.27	$ 975.64	$ 901.27	$ 975.64

Net asset value per share or per unit of investments in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes fair value disclosure.

EMERGING CTA PORTFOLIO LP 10-Q