Italy's populist government was heading into a budget battle with the European Union after disregarding pointed warnings to ease up on spending promises that have shattered previous deficit pledges and threaten Italy's ability to lower its heavy debt load.

The EU Commission President Jean-Claude Juncker told reporters in Brussels yesterday that the rest of Europe would revolt if the Commission accepted the budget draft that Italy submitted overnight.

But he also said he would listen to Italy's arguments during a period of discussion on the draft, and urged other member states "not to put Italy on the defendant's stand" during a two-day EU summit starting Wednesday.

Italy's economy minister, Giovanni Tria, also sought to keep tones down, telling reporters in Rome that the budget "would not make Europe fall apart" and negotiations will start with the EU.

Investors, meanwhile, have reacted with calm to the new Italian budget draft, which delivers on electoral promises to restore pensions to as many as 400,000 people whose retirement age had been pushed back and to create a basic salary for some job-seekers.

Italy's cost of borrowing 10-year money was stable at 3.45 percent. The main stock index in Milan was up nearly 1 percent.

Italian leaders say the budget plan will boost growth through higher spending. However, other European Union countries have raised concerns that the increase in Italy's budget deficit to 2.4 percent of annual GDP - beyond previous pledges of under 2 percent - will increase the already high public debt.