Table of Contents Favorable net prior year loss reserve development of $2 million and $25 million was recorded in 2019 and 2018. Further information on net prior year loss reserve development is in Note E to the Consolidated Financial Statements included under Item 8. The following table summarizes the gross and net carried reserves for Commercial. 35 December 31 (In millions) 2019 2018 Gross case reserves $ 3,937 $ 4,181 Gross IBNR reserves 4,719 4,562 Total gross carried claim and claim adjustment expense reserves $ 8,656 $ 8,743 Net case reserves $ 3,543 $ 3,831 Net IBNR reserves 4,306 4,167 Total net carried claim and claim adjustment expense reserves $ 7,849 $ 7,998