EX Date	06/22/2016	09/21/2016	12/21/2016	03/23/2017	06/22/2017	09/21/2017	12/21/2017	03/22/2018	06/21/2018	09/14/2018	12/18/2018	03/21/2019	06/14/2019	09/25/2019	12/13/2019	03/26/2020	06/25/2020	09/24/2020	12/24/2020	03/25/2021	06/24/2021	09/23/2021	12/23/2021	03/25/2022	06/24/2022	09/23/2022	12/23/2022	03/24/2023	06/27/2023	09/22/2023	12/22/2023	06/27/2024
Payment Date	06/30/2016	09/30/2016	12/30/2016	03/31/2017	06/30/2017	09/29/2017	12/29/2017	03/29/2018	06/29/2018	09/28/2018	12/31/2018	03/29/2019	06/28/2019	09/30/2019	12/31/2019	03/31/2020	06/30/2020	09/30/2020	12/31/2020	03/31/2021	06/30/2021	09/30/2021	12/31/2021	03/31/2022	06/30/2022	09/30/2022	12/30/2022	03/31/2023	06/30/2023	09/29/2023	12/29/2023	06/28/2024
Record Date	06/24/2016	09/23/2016	12/23/2016	03/27/2017	06/26/2017	09/22/2017	12/22/2017	03/23/2018	06/22/2018	09/17/2018	12/19/2018	03/22/2019	06/17/2019	09/26/2019	12/16/2019	03/27/2020	06/26/2020	09/25/2020	12/28/2020	03/26/2021	06/25/2021	09/24/2021	12/27/2021	03/28/2022	06/27/2022	09/26/2022	12/27/2022	03/27/2023	06/28/2023	09/25/2023	12/26/2023	06/27/2024
Declared Date	06/21/2016	09/20/2016	12/20/2016	03/22/2017	06/21/2017	09/20/2017	12/20/2017	01/09/2018	01/09/2018	01/09/2018	01/09/2018	03/20/2019	06/13/2019	09/24/2019	12/12/2019	03/25/2020	06/24/2020	09/23/2020	12/23/2020	01/25/2021	01/25/2021	09/22/2021	12/22/2021	03/24/2022	06/23/2022	09/22/2022	12/22/2022	03/23/2023	06/26/2023	09/21/2023	12/21/2023	12/22/2023
Amount	0.1474	0.1447	0.2134	0.0815	0.1264	0.1234	0.2603	0.0225	0.1974	0.0996	0.2641	0.0473	0.15	0.2918	0.3875	0.0965	0.1771	0.2541	0.3367	0.0128	0.1726	0.3724	0.4063	0.169	0.1957	0.2984	0.3782	0.2754	0.2058	0.238	0.4394	0.3468
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Currency	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD	USD
Description	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund	First Trust Mid Cap Core AlphaDEX Fund
Frequency	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	quarterly	Quarterly