Significant Accounting and Reporting Policies (Policies)	6 Months Ended
	Jun. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Any reference in this report to “the Company”, “we”, “our”, “us”, and “its’” are to TransUnion and its consolidated subsidiaries, collectively. The accompanying unaudited consolidated financial statements of TransUnion and subsidiaries have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information. In the opinion of management, all adjustments, including normal recurring adjustments, considered necessary for a fair presentation have been included. All significant intercompany transactions and balances have been eliminated. The operating results of TransUnion for the periods presented are not necessarily indicative of the results that may be expected for the full year ending December 31, 2016. These unaudited consolidated financial statements should be read in conjunction with our audited financial statements for the year ended December 31, 2015, included in Exhibit 99.1 of our Current Report on Form 8-K filed with the Securities and Exchange Commission (“SEC”) on June 1, 2016.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements of TransUnion include the accounts of TransUnion and all of its majority-owned or controlled subsidiaries. Investments in unconsolidated entities in which the Company has at least a 20% ownership interest, or where it is able to exercise significant influence, are accounted for using the equity method. Nonmarketable investments in unconsolidated entities in which the Company has less than a 20% ownership interest, or where it is not able to exercise significant influence, are accounted for using the cost method and periodically reviewed for impairment.
Subsequent Events	Subsequent Events Events and transactions occurring through the date of issuance of the financial statements have been evaluated by management and, when appropriate, recognized or disclosed in the financial statements or notes to the consolidated financial statements.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements On April 7, 2015, the FASB issued ASU No. 2015-03, Interest - Imputation of Interest (Subtopic 835-30), Simplifying the Presentation of Debt Issuance Costs. The amendments in this update require that unamortized debt issuance costs be presented in the balance sheet as a direct deduction from the carrying amount of the corresponding debt liability, consistent with debt discounts. The new guidance is required to be applied on a retrospective basis, wherein the balance sheet of each individual period presented is adjusted to reflect the period-specific effects of applying the new guidance. Accordingly, we have presented our debt as of June 30, 2016, and December 31, 2015, net of unamortized debt issue costs of $5.2 million and $3.9 million, respectively, on our balance sheet and in Footnote 8, “Debt.” On August 18, 2015, the FASB issued ASU 2015-15, Interest—Imputation of Interest (Subtopic 835-30) - Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements (Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting). The ASU indicates the SEC staff would not object to presenting deferred debt issuance costs for a line of credit arrangement as an asset in the balance sheet. We continue to present our deferred line of credit fees as an asset in the consolidated balance sheet. See Note 3 “Other Current Assets” and Note 4 “Other Assets.” Recent Accounting Pronouncements Not Yet Adopted On May 28, 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). This comprehensive guidance will replace all existing revenue recognition guidance and is effective for annual reporting periods beginning after December 15, 2017, and interim periods therein. During 2016, the FASB issued additional guidance: ASU No. 2016-09 Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net); ASU No. 2016-10 Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing; ASU No. 2016-11 Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 Pursuant to Staff Announcements at the March 3, 2016 EITF Meeting (SEC Update) and ASU No. 2016-12 Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients. This additional guidance updates and clarifies the guidance in certain sub-sections of Topic 606. We are currently assessing the impact this revenue recognition guidance will have on our consolidated financial statements. On January 5, 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. This ASU is intended to improve the recognition and measurement of financial instruments. Among other things, the ASU requires equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income. This guidance is effective for fiscal years beginning after December 15, 2017, and interim periods therein. We are currently assessing the impact this guidance will have on our consolidated financial statements. On February 25, 2016, the FASB issued ASU 2016-02, Leases (Topic 842). This ASU, among other things, will require lessee’s to record a lease liability, which is an obligation to make lease payments arising from a lease, and right-of-use asset, which is an asset that represents the right to use, or control the use of, a specified asset for the lease term, for all long-term leases. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We are currently assessing the impact this guidance will have on our consolidated financial statements. On March 30, 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. This ASU simplifies several aspects of the accounting for share-based payment award transactions, including income tax consequences, classification of awards, and classification on the statement of cash flows. This guidance is effective for annual reporting periods beginning after December 15, 2017, including interim periods therein. We are currently assessing the impact this guidance will have on our consolidated financial statements. On June 16, 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. In addition, these amendments require the measurement of all expected credit losses for financial assets, including trade accounts receivable, held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. This guidance is effective for annual reporting periods beginning after December 15, 2019, including interim period therein. We are currently assessing the impact this guidance will have on our consolidated financial statements.