Item 6. SELECTED FINANCIAL DATA

You should read the selected financial data set forth below in conjunction with (i) "Item 7 ‑ Management's Discussion and Analysis of Financial Condition and Results of Operations," (ii) "Item 8 ‑ Financial Statements and Supplementary Data" and (iii) the historical consolidated financial statements of Global Payments and the related notes presented in this Annual Report on Form 10-K.

Our financial results for the year ended December 31, 2020 reflect the unfavorable effects of the COVID-19 pandemic on our revenues as governments took actions to encourage social distancing and implemented shelter-in-place directives, slightly offset by cost-saving actions, such as reductions in employee compensation costs and discretionary spending, to help mitigate the financial effects of the COVID-19 pandemic. See “Item 7 - Management’s Discussion and Analysis of Financial Condition and Results of Operations” for further discussion of the effects of the COVID-19 pandemic.

As more fully described in "Note 1—Basis of Presentation and Summary of Significant Accounting Policies" in the notes to the accompanying consolidated financial statements, we adopted a new revenue accounting standard on January 1, 2018 that results in revenue being presented net of certain fees that we pay to third parties, including payment networks. This change in presentation affected our reported revenues and operating expenses for all periods after the year ended December 31, 2017 by the same amount and had no effect on operating income.

The selected financial data in the table above reflect the effects of acquisitions and borrowings to fund certain of those acquisitions. Notably, in 2019, we completed the Merger for total purchase consideration of $24.5 billion, primarily funded with shares of our common stock. We also restructured our long-term debt facilities to include a $5.0 billion credit facility, consisting of a senior unsecured $2.0 billion term loan and a $3.0 billion revolving loan facility, and unsecured senior notes of $3.0 billion. In addition, we also assumed $3.0 billion of TSYS' unsecured senior notes in the Merger. See "Note 2—Acquisitions" and "Note 8—Long-Term Debt and Lines of Credit," respectively, in the notes to the accompanying consolidated financial statements for further discussion of our acquisitions and borrowing arrangements.

Operating income, net income, net income attributable to Global Payments and basic and diluted earnings per share in the table above reflect acquisition and integration expenses of $320.0 million for the year ended December 31, 2020, $255.6 million for the year ended December 31, 2019, $56.1 million for the year ended December 31, 2018, $94.6 million for the year ended December 31, 2017, $91.6 million for the seven months ended December 31, 2016 and $51.3 million for the year ended May 31, 2016.

Net income, net income attributable to Global Payments and basic and diluted earnings per share in the table above also reflect the following:

(a) the effects of a net income tax benefit of $23.3 million in connection with adjustments made to accounting estimates associated with the U.S. Tax Cuts and Jobs Act of 2017 ("2017 U.S. Tax Act") for the year ended December 31, 2018 and a provisional net income tax benefit of $158.7 million recorded in connection with the 2017 U.S. Tax Act for the year ended December 31, 2017; and

(b) a gain of $27.7 million and $41.2 million for the year ended December 31, 2020 and the seven months ended December 31, 2016, respectively, recognized in connection with the sale of our membership interests in Visa Europe Limited.