Chevron (CVX -0.14%) is one of the top holdings of Warren Buffett's Berkshire Hathaway (BRK.A 1.53%) (BRK.B 1.31%). Buffett's company owns 6.8% of the oil giant's outstanding shares (118.6 million shares worth $16.7 billion). It's Berkshire's fifth-largest holding at 5.8$800 million in dividend income from Chevron this year. Here's why investors who want to gen ...