U.S. stock index futures rose slightly on Monday after global leaders pledged to cut government deficits and adopted a more flexible timeline for banks to take on new capital rules.

At the Group of 20 summit in Toronto over the weekend, leaders agreed to take divergent paths on ways to trim budget deficits while ensuring the global economic recovery remains intact, a reversal from the unity of past crisis-era summits.

The G20 leaders also softened a 2012 deadline for banks to build up higher levels of capital and liquidity.

U.S. President Barack Obama's efforts to win final approval for a financial regulatory reform bill looked more complicated over the weekend after a Republican senator threatened to oppose it.

S&P 500 futures added 3.2 points and were above fair value, a formula that evaluates pricing by taking into account interest rates, dividends and time to expiration on the contract. Dow Jones industrial average futures rose 19 points, and Nasdaq 100 futures were up 7.75 points.

Russian President Dmitry Medvedev called for a special levy on oil companies to finance a fund to help clean up environmental disasters such as BP Plc's oil spill in the Gulf of Mexico.

Financial woes may force a state-owned Dubai firm to renegotiate about 220 aircraft orders with Boeing Co and Airbus , a French newspaper reported.

Separately, Air China <601111.SS><0753.HK> said late Friday it will buy 20 Boeing 777-800 airliners for $1.4 billion.

Miners will be in the spotlight after the Australian government's hopes of defusing a dispute over a planned mining tax hit a snag when one political party vowed to block any attempt to seriously water down the tax.

The day's economic data includes May personal income and consumption data at 8:30 a.m. EDT <1230 GMT>. Economists in a Reuters survey forecast personal income up 0.5 percent, compared with 0.4 percent previously.

On the earnings calendar, Barnes & Noble Inc , Micron Technology Inc and Standard Microsystems Corp are all due to report results Monday.

European stocks rose about 1 percent Monday morning, led by the banking sector, after the G20 summit's decision on bank rules for capital and liquidity.

On Friday, the Nasdaq <.IXIC> and S&P 500 <.SPX> edged higher on relief over the U.S. financial rules overhaul. For the week, the Dow <.DJI> fell 2.9 percent, the S&P 500 was off 3.6 percent and the Nasdaq Composite fell 3.7 percent.

(Reporting by Angela Moon; editing by Jeffrey Benkoe)