of accounting. These impairment charges were recorded in the line item other income (loss) — net in our consolidated statement of income and impacted the Corporate operating segment. Refer to the heading "Operations Review — Other Income (Loss) — Net" below as well as Note 16 and Note 17 of Notes to Consolidated Financial Statements. 

Our Company invests in infrastructure programs with our bottlers that are directed at strengthening our bottling system and increasing unit case volume. Additionally, our Company advances payments to certain customers for distribution rights as well as to fund future marketing activities intended to generate profitable volume and expenses such payments over the periods benefited. Payments under these programs are generally capitalized and reported in the line items prepaid expenses and other assets or other assets, as appropriate, in our consolidated balance sheets. When facts and circumstances indicate that the carrying value of these assets (or asset groups) may not be recoverable, management assesses the recoverability of the carrying value by preparing estimates of sales volume and the resulting gross profit and cash flows. These estimated future cash flows are consistent with those we use in our internal planning. If the sum of the expected future cash flows (undiscounted and without interest charges) is less than the carrying amount, we recognize an impairment loss. The impairment loss recognized is the amount by which the carrying amount exceeds the fair value. 

Property, Plant and Equipment 

As of December 31, 2013, the carrying value of our property, plant and equipment, net of depreciation, was $14,967 million, or 17 percent of our total assets. Certain events or changes in circumstances may indicate that the recoverability of the carrying amount or remaining useful life of property, plant and equipment should be assessed, including, among others, the manner or length of time in which the Company intends to use the asset, a significant decrease in market value, a significant change in the business climate in a particular market, or a current period operating or cash flow loss combined with historical losses or projected future losses. When such events or changes in circumstances are present and an impairment review is performed, we estimate the future cash flows expected to result from the use of the asset (or asset group) and its eventual disposition. These estimated future cash flows are consistent with those we use in our internal planning. If the sum of the expected future cash flows (undiscounted and without interest charges) is less than the carrying amount, we recognize an impairment loss. The impairment loss recognized is the amount by which the carrying amount exceeds the fair value. We use a variety of methodologies to determine the fair value of property, plant and equipment, including appraisals and discounted cash flow models, which are consistent with the assumptions we believe hypothetical marketplace participants would use. 

Goodwill, Trademarks and Other Intangible Assets 

Intangible assets are classified into one of three categories: (1) intangible assets with definite lives