Congressional negotiators reached a modest budget agreement Tuesday to restore about $63 billion in automatic spending cuts from programs ranging from parks to the Pentagon, with votes expected in both houses in the next several days.

Officials said the increases would be offset by a variety of spending reductions and increased fees elsewhere in the budget totalling about $85 billion over a decade, leaving enough for a largely symbolic cut of more than $20 billion in the nation's $17 trillion debt.

The deal "reduces the deficit by $23 billion and it does not raise taxes. It cuts spending in a smarter way" than the ones in effect, said Representative Paul Ryan, the Wisconsin Republican who chairs the House Budget Committee and was his party's negotiator in several weeks of secretive talks.

His Democratic counterpart, Senator Patty Murray of Washington, said, "We have broken through the partisanship and gridlock" that could have produced a government shutdown in January.

The offsetting deficit cuts include a requirement for newly hired federal workers to make larger contributions to their own pensions, as well as an increase in a federal airport security fee that would add $5 to the cost of a typical roundtrip flight. Also included were unspecified savings from military retirement programs.

Officials said Democrats had failed in their bid to include an extension of benefits for workers unemployed longer than 26 weeks. The program expires on Dec. 28, when payments will be cut off for an estimated 1.3 million individuals.

Congressional aides predicted bipartisan approval in both houses, despite grumbling from liberals over the omission of the unemployment extension, and even though tea party-aligned groups have already begun pushing Republican conservatives to oppose it.

The budget deal was one of a handful of measures left on Congress' to-do list near the end of a year that produced little by way of compromise.

Officials said that under the agreement, an estimated $63 billion in automatic spending cuts would be restored through the end of the next budget year, which runs to Sept. 30, 2015.

Conservative organizations attacked the proposal as a betrayal of a hard-won 2011 agreement that reduced government spending and is counted as among the main accomplishments of tea party-aligned Republicans who came to power earlier the same year in the House.

Americans for Prosperity issued a midmorning statement saying that GOP lawmakers should uphold current spending levels. Otherwise, the group said, "congressional Republicans are joining liberal Democrats in breaking their word to the American people to finally begin reining in government overspending that has left us over $17 trillion in debt."

A day earlier, Heritage Action issued a similar broadside, saying it could not support a deal that "would increase spending in the near-term for promises of woefully inadequate long-term reductions." The group played an influential behind-the-scenes role earlier this fall in events that led to a partial government shutdown, supporting a strategy of refusing to provide needed funds for federal programs until the health care law known as "Obamacare" was defunded.

For their part, liberals were unhappy that the deal was likely to lack an extension of benefits for unemployed workers more than 26 weeks off the job.

The party's leader, Representative Nancy Pelosi of California, said at one point last week that her rank and file would insist on an extension for the unemployment program as a condition for supporting a budget deal.

The White House pointedly refused to support her position, and she later made additional comments that her staff characterized as a clarification.

Given the internal GOP divisions in the House, Speaker John Boehner is likely to need Democratic votes to approve any deal by Ryan and Murray. It was not immediately clear how many Democratic lawmakers would support a plan that lacked an extension of unemployment benefits.

Some Democratic officials suggested a possible two-step solution. It included swift passage of any budget agreement that emerges, and then adding an extension of unemployment benefits to must-pass legislation early next year, perhaps a measure to reverse a looming cut in payments to doctors who treat Medicare patients.