BUSINESS SEGMENT INFORMATION The Company consists of two reportable insurance business segments: Aflac Japan and Aflac U.S., both of which sell supplemental health and life insurance. In addition, operating business units that are not individually reportable and business activities, including reinsurance retrocession activities, not included in Aflac Japan or Aflac U.S. are included in Corporate and other. The Company does not allocate corporate overhead expenses to business segments. Consistent with U.S. GAAP accounting guidance for segment reporting, the Company evaluates and manages its business segments using a financial performance measure called pretax adjusted earnings. Adjusted earnings are adjusted revenues less benefits and adjusted expenses. The adjustments to both revenues and expenses account for certain items that cannot be predicted or that are outside managements control. Adjusted revenues are U.S. GAAP total revenues excluding realized investment gains and losses, except for amortized hedge costs/income related to foreign currency exposure management strategies and net interest cash flows from derivatives associated with certain investment strategies. Adjusted expenses are U.S. GAAP total acquisition and operating expenses including the impact of interest cash flows from derivatives associated with notes payable but excluding any nonrecurring or other items not associated with the normal course of the Companys insurance operations and that do not reflect Aflacs underlying business performance. The Company excludes income taxes related to operations to arrive at pretax adjusted earnings. Information regarding operations by reportable segment and Corporate and other, follows: Three Months Ended March 31, (In millions) 2019 2018 Revenues: Aflac Japan: Net earned premiums $ 3,180 $ 3,263 Net investment income, less amortized hedge costs 610 588 Other income 12 12 Total Aflac Japan 3,802 3,863 Aflac U.S.: Net earned premiums 1,461 1,427 Net investment income 177 175 Other income 2 2 Total Aflac U.S. 1,640 1,604 Corporate and other 95 79 Total adjusted revenues 5,537 5,546 Realized investment gains (losses) (1),(2),(3) 120 (82 ) Total revenues $ 5,657 $ 5,464 (1) Amortized hedge costs of $62 and $55 for the three -month periods ended March 31, 2019 , and 2018 , respectively, related to certain foreign currency exposure management strategies have been reclassified from realized investment gains (losses) and reported as a deduction from net investment income when analyzing operations. (2) Amortized hedge income of $20 and $2 for the three -month periods ended March 31, 2019 , and 2018 , respectively, related to certain foreign currency exposure management strategies has been reclassified from realized investment gains (losses) and reported as an increase to net investment income when analyzing operations. (3) Net interest cash flows from derivatives associated with certain investment strategies of $(7) for the three -month period ended March 31, 2019 and an immaterial amount in 2018, respectively, have been reclassified from realized investment gains (losses) and included in adjusted earnings as a component of net investment income. Three Months Ended March 31, (In millions) 2019 2018 Pretax earnings: Aflac Japan $ 834 $ 818 Aflac U.S. 323 337 Corporate and other (18 ) (46 ) Pretax adjusted earnings 1,139 1,109 Realized investment gains (losses) (1),(2),(3),(4) 103 (98 ) Other income (loss) 0 (29 ) Total earnings before income taxes $ 1,242 $ 982 Income taxes applicable to pretax adjusted earnings $ 291 $ 289 Effect of foreign currency translation on after-tax adjusted earnings (8 ) 21 (1) Amortized hedge costs of $62 and $55 for the three -month periods ended March 31, 2019 , and 2018 , respectively, related to certain foreign currency management strategies have been reclassified from realized investment gains (losses) and reported as a deduction from pretax adjusted earnings when analyzing operations. (2) Amortized hedge income of $20 and $2 for the three -month periods ended March 31, 2019 , and 2018 , respectively, related to certain foreign currency management strategies has been reclassified from realized investment gains (losses) and reported as an increase in pretax adjusted earnings when analyzing operations. (3) Net interest cash flows from derivatives associated with certain investment strategies of $(7) for the three -month period ended March 31, 2019 and an immaterial amount in 2018, respectively, have been reclassified from realized investment gains (losses) and included in adjusted earnings as a component of net investment income. (4) A gain of $17 and $17 for the three -month periods ended March 31, 2019 , and 2018 , respectively, related to the interest rate component of the change in fair value of foreign currency swaps on notes payable have been reclassified from realized investment gains (losses) and included in adjusted earnings when analyzing operations Assets were as follows: (In millions) March 31, 2019 December 31, 2018 Assets: Aflac Japan $ 123,042 $ 118,342 Aflac U.S. 19,965 19,100 Corporate and other 2,672 2,964 Total assets $ 145,679 $ 140,406