External Revenues Intersegment Revenues Total Revenues Operating Profit (Loss) Depreciation and Amortization Expense Operating Profit Before Depreciation and Amortization(1) (Dollars in Millions) Three Months Ended March 31, 2013 DIRECTV U.S. $ 5,788 $ 2 $ 5,790 $ 1,115 $ 406 $ 1,521 Sky Brasil 965   965 154 157 311 PanAmericana 763   763 (37 ) 106 69 DIRECTV Latin America 1,728   1,728 117 263 380 Sports Networks, Eliminations and Other 64 (2 ) 62 10 9 19 Total $ 7,580 $   $ 7,580 $ 1,242 $ 678 $ 1,920 March 31, 2012 DIRECTV U.S. $ 5,497 $ 2 $ 5,499 $ 1,038 $ 372 $ 1,410 Sky Brasil 881   881 151 136 287 PanAmericana 604   604 98 83 181 DIRECTV Latin America 1,485   1,485 249 219 468 Sports Networks, Eliminations and Other 64 (2 ) 62 21 4 25 Total $ 7,046 $   $ 7,046 $ 1,308 $ 595 $ 1,903 (1) Operating profit before depreciation and amortization, which is a financial measure that is not determined in accordance with GAAP can be calculated by adding amounts under the caption "Depreciation and amortization expense" to "Operating profit." This measure should be used in conjunction with GAAP financial measures and is not presented as an alternative measure of operating results, as determined in accordance with GAAP. Our management and Board of Directors use operating profit before depreciation and amortization to evaluate the operating performance of our company and our business segments and to allocate resources and capital to business segments. This metric is also used as a measure of performance for incentive compensation purposes and to measure income generated from operations that could be used to fund capital expenditures, service debt or pay taxes. Depreciation and amortization expense primarily represents an allocation to current expense of the cost of historical capital expenditures and for intangible assets resulting from prior business acquisitions. To compensate for the exclusion of depreciation and amortization expense from operating profit, our management and Board of Directors separately measure and bu