OPERATING SEGMENT INFORMATION The Company's operating segments as of December 28, 2019 are Mobile Products (MP) and Infrastructure and Defense Products (IDP) based on the organizational structure and information reviewed by the Company's Chief Executive Officer, who is the Company's chief operating decision maker ("CODM"), and these segments are managed separately based on the end markets and applications they support. The CODM allocates resources and assesses the performance of each operating segment primarily based on non-GAAP operating income. MP is a global supplier of cellular RF and Wi-Fi solutions for a variety of mobile devices, including smartphones, wearables, laptops, tablets and cellular-based applications for the Internet of Things ("IoT"). IDP is a global supplier of RF, system-on-a-chip and power management solutions for cellular base station, smart home, IoT, defense and automotive applications. The All other category includes operating expenses such as stock-based compensation, amortization of intangible assets, acquisition and integration related costs, restructuring costs, start-up costs, asset impairment and accelerated depreciation, (loss) gain on assets, and other miscellaneous corporate overhead expenses that the Company does not allocate to its reportable segments because these expenses are not included in the segment operating performance measures evaluated by the Companys CODM. The CODM does not evaluate operating segments using discrete asset information. The Companys operating segments do not record intercompany revenue. The Company does not allocate gains and losses from equity investments, interest and other income, or taxes to operating segments. Except as discussed above regarding the All other category, the Companys accounting policies for segment reporting are the same as for the Company as a whole. The following tables present details of the Companys reportable segments and a reconciliation of the All other category (in thousands): Three Months Ended Nine Months Ended December 28, 2019 December 29, 2018 December 28, 2019 December 29, 2018 Revenue: MP $ 662,109 $ 602,312 $ 1,841,468 $ 1,754,930 IDP 206,964 230,018 609,901 654,513 Total revenue $ 869,073 $ 832,330 $ 2,451,369 $ 2,409,443 Operating income (loss): MP $ 219,778 $ 180,394 $ 553,144 $ 466,513 IDP 32,628 80,861 97,721 192,376 All other (99,337 ) (180,098 ) (329,803 ) (506,470 ) Operating income 153,069 81,157 321,062 152,419 Interest expense (16,900 ) (9,562 ) (41,457 ) (33,604 ) Interest income 2,874 2,814 8,112 7,788 Other income (expense) (Notes 4 &amp; 7) 44,148 (3,520 ) 42,737 (85,007 ) Income before income taxes $ 183,191 $ 70,889 $ 330,454 $ 41,596 Three Months Ended Nine Months Ended December 28, 2019 December 29, 2018 December 28, 2019 December 29, 2018 Reconciliation of All other category: Stock-based compensation expense $ (16,381 ) $ (18,624 ) $ (62,210 ) $ (58,874 ) Amortization of intangible assets (62,910 ) (132,227 ) (177,380 ) (398,518 ) Acquisition and integration related costs (7,226 ) (3,700 ) (37,905 ) (5,880 ) Restructuring costs (5,956 ) (1,510 ) (17,850 ) (4,822 ) Start-up costs (361 ) (6,791 ) (461 ) (18,035 ) Asset impairment and accelerated depreciation (4,324 ) (17,994 ) (26,897 ) (17,994 ) Other (including (loss) gain on assets and other miscellaneous corporate overhead) (2,179 ) 748 (7,100 ) (2,347 ) Loss from operations for All other $ (99,337 ) $ (180,098 ) $ (329,803 ) $ (506,470 )