House Republicans Friday unveiled their bill to extend the payroll tax cut, jobless benefits and the Medicare reimbursement formula, setting up an early week vote and a Christmastime showdown with the Democratic Senate.

The bill — called the Middle Class Tax Relief and Job Creation Act of 2011 — is nearly 370 pages, and includes peripheral issues such as restarting the stalled Keystone XL pipeline project, altering of environmental regulations and the selling of broadband spectrum.