The first stock that's as rock-solid financially as they come is healthcare conglomerate Johnson & Johnson ( JNJ -1.24% ). Despite carrying around $30.2 billion in debt, Johnson & Johnson also sports $17.9 billion in cash, and has generated $21.4 billion in operating cash flow over just the past 12 trailing months. According to Wall Street projections, this operating cash flow should expand to an estimated $28.7 billion by 2021.