This document provides a summary of Principal Financial Group's second quarter 2013 earnings call. It discusses the use of non-GAAP financial measures to evaluate performance alongside GAAP measures. The company uses non-GAAP measures to illustrate normal ongoing operations, but also provides reconciliations to GAAP measures. It notes strong investment performance across many of its mutual funds and separate accounts. The document also summarizes key points regarding the company's accumulation and guaranteed retirement businesses, noting growth in net revenue and operating earnings for both segments compared to the prior year.