v2.4.0.6

Operating Segments (Details 4) (USD $) In Millions, unless otherwise specified	8 Months Ended					4 Months Ended	12 Months Ended	4 Months Ended	12 Months Ended	4 Months Ended	12 Months Ended	4 Months Ended	12 Months Ended	4 Months Ended	12 Months Ended
	Dec. 31, 2012 TransUnion Corp-Successor [Member]	Dec. 31, 2012 TransUnion Corp-Successor [Member] U.S. Information Services [Member]	Dec. 31, 2012 TransUnion Corp-Successor [Member] International [Member]	Dec. 31, 2012 TransUnion Corp-Successor [Member] Interactive [Member]	Dec. 31, 2012 TransUnion Corp-Successor [Member] Corporate [Member]	Apr. 30, 2012 TransUnion Corp-Predecessor [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member]	Apr. 30, 2012 TransUnion Corp-Predecessor [Member] U.S. Information Services [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member] U.S. Information Services [Member]	Apr. 30, 2012 TransUnion Corp-Predecessor [Member] International [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member] International [Member]	Apr. 30, 2012 TransUnion Corp-Predecessor [Member] Interactive [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member] Interactive [Member]	Apr. 30, 2012 TransUnion Corp-Predecessor [Member] Corporate [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member] Corporate [Member]
Cash paid for capital expenditures, by segment
Cash paid for capital expenditures, by segment	$ 48.8	$ 30.8	$ 8.6	$ 2.8	$ 6.6	$ 20.4	$ 74.0	$ 14.3	$ 54.3	$ 2.4	$ 12.3	$ 1.3	$ 2.1	$ 2.4	$ 5.3

X

- Definition

Total expenditures for additions to long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets of the reportable segment; if the amount: (a) is included in the determination of segment assets reviewed by the chief operating decision maker or (b) is otherwise regularly provided to the chief operating decision maker, even if not included in the determination of segment assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 28

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration