Overview and Basis of Presentation	6 Months Ended
Jun. 30, 2019
Accounting Policies [Abstract]
Overview and Basis of Presentation	Note 1. Overview and Basis of Presentation Description of Business Donnelley Financial Solutions, Inc. (“DFIN,” or the “Company”) is a leading global risk and compliance solutions company. The Company provides regulatory filing and deal solutions via its software-as-a-service (“SaaS”), technology-enabled services and print and distribution solutions to public and private companies, mutual funds and other regulated investment firms, to serve their regulatory and compliance needs. For corporate clients within its capital markets offerings, the Company offers technology-enabled filing solutions that allow U.S. public companies to comply with applicable U.S. Securities and Exchange Commission (“SEC”) regulations including filing agent services, digital document creation and online content management tools that support their corporate financial transactions and regulatory reporting; solutions to facilitate clients’ communications with their shareholders; and virtual data rooms and other deal management solutions. For the investment markets, including alternative investment and insurance investment companies, the Company provides technology-enabled filing solutions including cloud-based tools for creating and filing high-quality regulatory documents and solutions for investors designed to improve the speed and accuracy of their access to investment information. Throughout a company’s life cycle, the Company serves its clients’ regulatory and compliance needs. The Company’s deep industry and regulatory expertise and a commitment to exceptional service guides our clients to navigate a high-stakes and ever-changing regulatory environment. Basis of Presentation The accompanying unaudited condensed consolidated financial statements include the accounts of DFIN and have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information and in accordance with the rules and regulations of the SEC. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The financial data presented herein should be read in conjunction with the audited consolidated and combined financial statements and accompanying notes included in the Company’s latest Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC on February 27, 2019. In the opinion of management, the financial data presented includes all adjustments necessary to present fairly the financial position, results of operations and cash flows for the interim periods presented. Results of interim periods should not be considered indicative of the results for the full year. These unaudited condensed consolidated interim financial statements include estimates and assumptions of management that affect the amounts reported in the unaudited condensed consolidated financial statements. Actual results could differ from these estimates. Changes in Presentation Certain prior year amounts have been restated to conform to the Company’s current reporting unit structure. Due to the sale of the Language Solutions business in 2018, the Company made changes to the reporting units within the U.S. segment. The former Language Solutions and other reporting unit has been renamed “Language Solutions.” Certain results previously included within the former Language Solutions and other reporting unit are now included within the Investment Markets reporting unit.

Overview and Basis of Presentation

6 Months Ended

Jun. 30, 2019

Note 1. Overview and Basis of Presentation

Description of Business

Donnelley Financial Solutions, Inc. (“DFIN,” or the “Company”) is a leading global risk and compliance solutions company. The Company provides regulatory filing and deal solutions via its software-as-a-service (“SaaS”), technology-enabled services and print and distribution solutions to public and private companies, mutual funds and other regulated investment firms, to serve their regulatory and compliance needs. For corporate clients within its capital markets offerings, the Company offers technology-enabled filing solutions that allow U.S. public companies to comply with applicable U.S. Securities and Exchange Commission (“SEC”) regulations including filing agent services, digital document creation and online content management tools that support their corporate financial transactions and regulatory reporting; solutions to facilitate clients’ communications with their shareholders; and virtual data rooms and other deal management solutions. For the investment markets, including alternative investment and insurance investment companies, the Company provides technology-enabled filing solutions including cloud-based tools for creating and filing high-quality regulatory documents and solutions for investors designed to improve the speed and accuracy of their access to investment information. Throughout a company’s life cycle, the Company serves its clients’ regulatory and compliance needs. The Company’s deep industry and regulatory expertise and a commitment to exceptional service guides our clients to navigate a high-stakes and ever-changing regulatory environment.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements include the accounts of DFIN and have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information and in accordance with the rules and regulations of the SEC. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The financial data presented herein should be read in conjunction with the audited consolidated and combined financial statements and accompanying notes included in the Company’s latest Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC on February 27, 2019. In the opinion of management, the financial data presented includes all adjustments necessary to present fairly the financial position, results of operations and cash flows for the interim periods presented. Results of interim periods should not be considered indicative of the results for the full year. These unaudited condensed consolidated interim financial statements include estimates and assumptions of management that affect the amounts reported in the unaudited condensed consolidated financial statements. Actual results could differ from these estimates.

Changes in Presentation

Certain prior year amounts have been restated to conform to the Company’s current reporting unit structure. Due to the sale of the Language Solutions business in 2018, the Company made changes to the reporting units within the U.S. segment. The former Language Solutions and other reporting unit has been renamed “Language Solutions.” Certain results previously included within the former Language Solutions and other reporting unit are now included within the Investment Markets reporting unit.