Factbox: What happens in a U.S. government shutdown over funding

(Reuters) - The U.S. government could shut down next week if Congress does not resolve, even temporarily, a dispute over Planned Parenthood and agree on a plan to extend federal funding beyond Sept. 30. If a shutdown happens, essential national security and public safety programs would continue. In a 17-day shutdown in October 2013, an estimated 850,000 workers were idled.