ConocoPhillips is very optimistic about what's ahead.ConocoPhillips (COP -1.55%) is firing on all cylinders these days. The oil giant's legacy business is performing extremely well. Meanwhile, the company is about to get a big boost from closing its needle-moving acquisition of Marathon Oil (MRO -1.55%). Those factors are giving the oil stock the confidence to return a lot more cash to its shareholders. It's boosting its dividend and share repurchase program.Drilling down into ConocoPhillips' third-quarter ...