From the Introduction: "The Department of Homeland Security (DHS) is the third largest agency in the federal government in terms of personnel. The appropriations bill that funds it--providing almost $72 billion in FY2021--is the seventh largest of the 12 annual funding measures developed by the appropriations committees, and is the only appropriations bill that funds a single agency in its entirety and nothing else. This report provides an overview of the FY2022 budget request for the Department of Homeland Security. It provides a component-level overview of the appropriations sought in the FY2022 budget request, and puts the requested appropriations in context with the FY2021 requested and enacted level of appropriations, while noting some of the factors behind the larger changes from those baselines."
CRS Report for Congress, R46822
Congressional Research Service: https://crsreports.congress.gov/