WASHINGTON (Reuters) -Top U.S. congressional leaders on Sunday agreed on $1.6 trillion in top-line federal spending for fiscal year 2024 in a deal aimed at averting a partial government shutdown later this month, U.S. House of Representatives Speaker Mike Johnson said. The top-line figure includes $886 billion for defense and $704 billion for non-defense spending, Johnson, a Republican, said in a letter to lawmakers on Sunday. The defense portion had already been signed into law by President Joe Biden last month through the defense spending bill.