This excerpt taken from the PFE 10-K filed Feb 26, 2010.
Financial Condition, Liquidity and Capital Resources
Net Financial Assets/(Liabilities) as shown below:
We rely largely on operating cash flow, short-term investments, short-term commercial paper borrowings and long-term debt to provide for the working capital needs of our operations, including our R&D activities. We believe that we have the ability to obtain both short-term and long-term debt to meet our financing needs for the foreseeable future. The overall decrease in Net financial assets/(liabilities) in 2009, as shown above, reflects cash flows from operating activities, which were more than offset by the issuance of senior unsecured notes of which virtually all of the proceeds were used to partially finance the Wyeth acquisition. We believe we have the flexibility to allocate our significant operating cash flows with a continued focus on seeking to provide the highest return for our shareholders, such as potential dividend increases, share repurchases, investments in our business, or by paying down outstanding debt. The significant changes in the components of Net financial assets/(liabilities), as shown above, are as follows: