Department of Homeland Security, U.S. Immigration and Customs Enforcement, Salaries and Expenses: Fiscal Year 2011 Overview Congressional Justification [open pdf - 1MB]
"Programs funded through the Salaries and Expenses account contribute to the ICE mission of bringing a unified and coordinated focus to the enforcement of federal immigration and customs laws. Salaries and Expenses resources are used to combat terrorism and illegal immigration activities through investigating, detaining, and prosecuting both criminal and other aliens, and domestic gangs. These activities protect the infrastructure and persons within the United States. […] U.S. Immigration and Customs Enforcement (ICE) requests 20,550 positions, 20,164 FTE [Full Time Employees], and $5,439,100,000 for FY 2011 in the Salaries and Expenses (S&E) account. In order to accomplish the agency's objectives and mission, ICE requests $5,358,762,000 and 20,044 FTE to maintain current services and $80,338,000 and 120 FTE in program enhancements in the S&E account."
Immigration and Customs Enforcement, ICE FOIA 10-2674.000632
U.S. Immigration and Customs Enforcement: http://www.ice.gov/