The Trump administration is loosening restrictions on the sharing of law enforcement information with the CIA and other intelligence agencies, officials said, overriding controls that have been in place for decades to protect the privacy of U.S. citizens.

Government officials said the changes could give the intelligence agencies access to a database containing hundreds of millions of documents — from FBI case files and banking records to criminal investigations of labor unions — that touch on the activities of law-abiding Americans.

Administration officials said they are providing the intelligence agencies with more information from investigations by the FBI, Drug Enforcement Administration and other agencies to combat drug gangs and other transnational criminal groups that the administration has classified as terrorists.