Diluted Earnings Per Share In December 2017, the 2017 Tax Cuts and Jobs Act was enacted and significantly impacted the U.S. tax law. As a result of this legislation, our fourth quarter and full year 2017 provision for income taxes increased by $2.27 billion, which impacted our effective tax rate, net income and diluted EPS for such periods. Our diluted EPS decreased by $0.77 for both the fourth quarter and full year 2017. 14