Kodiak Gas Services Inc [Member] NGL Energy Partners L P [Member] Williams Cos Inc The [Member] ONEOK Inc [Member] Plains All American Pipeline L P [Member] Targa Resources Corp [Member] Enterprise Products Partners L P [Member] Western Midstream Partners L P [Member] Energy Transfer L P [Member] MPLX L P [Member] Natural Gas Pipeline Transportation [Member] Diversified [Member] Terminalling And Storage [Member] Production And Mining [Member] Pipelines And Midstream Diversified [Member] C000209569 [Member] Class R6 C000209568 [Member] Class R5 C000209567 [Member] Class Y C000209566 [Member] Class R C000209565 [Member] Class C C000209570 [Member] Class A Other Energy Equipment [Member] Gas Gathering and Processing Equipment [Member] Petroleum Products [Member] Money Market Funds [Member] C000209574 [Member] C000209575 [Member] C000209576 [Member] C000209573 [Member] C000209571 [Member] C000209572 [Member] Hess Midstream L P Class A [Member] Sunoco L P [Member] Money Market Funds Plus Other Assets Less Liabilities [Member] Antero Midstream Corp [Member] USA Compression Partners L P [Member] C000209581 [Member] C000209580 [Member] C000209579 [Member] C000209578 [Member] C000209577 [Member] C000209582 [Member] C000209588 [Member] C000209587 [Member] C000209586 [Member] C000209585 [Member] C000209584 [Member] C000209583 [Member] Investment Type [Axis] Net Assets Investment Company Portfolio Turnover No Trading Symbol Flag