v2.4.0.6

Operating Segments (Details 1) (USD $) In Millions, unless otherwise specified	8 Months Ended	4 Months Ended	12 Months Ended
	Dec. 31, 2012 TransUnion Corp-Successor [Member]	Apr. 30, 2012 TransUnion Corp-Predecessor [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member]	Dec. 31, 2010 TransUnion Corp-Predecessor [Member]
Reconciliation of operating income (loss) to income from continuing operations before income tax:
Operating income from segments	$ 142.1	$ (0.2)	$ 252.7	$ 216.1
Non-operating income and expense	(69.9)	(63.7)	(185.6)	(133.1)
Income (loss) from continuing operations before income taxes	$ 72.2	$ (63.9)	$ 67.1	$ 83.0

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- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Article 5

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- Definition

The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.7)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688



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The net result for the period of deducting operating expenses from operating revenues.

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