v2.4.0.6

Purchased Intangible Assets (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended		10 Months Ended	8 Months Ended		4 Months Ended	12 Months Ended		4 Months Ended	12 Months Ended			1 Months Ended				1 Months Ended		4 Months Ended	12 Months Ended			1 Months Ended		4 Months Ended	12 Months Ended			1 Months Ended				1 Months Ended		12 Months Ended
	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 TransUnion Holding Company, Inc. [Member]	Dec. 31, 2012 TransUnion Corp-Successor [Member]	Dec. 31, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Apr. 30, 2012 TransUnion Corp-Predecessor [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member]	Dec. 31, 2010 TransUnion Corp-Predecessor [Member]	Apr. 30, 2012 Database and credit files [Member]	Dec. 31, 2012 Database and credit files [Member]	Dec. 31, 2012 Database and credit files [Member] TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Apr. 30, 2012 Database and credit files [Member] TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Apr. 30, 2012 Database and credit files [Member] TransUnion Corp-Predecessor [Member]	Dec. 31, 2011 Database and credit files [Member] TransUnion Corp-Predecessor [Member]	Dec. 31, 2012 Internally developed software [Member] TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Apr. 30, 2012 Internally developed software [Member] TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Apr. 30, 2012 Internally developed software [Member] TransUnion Corp-Predecessor [Member]	Dec. 31, 2011 Internally developed software [Member] TransUnion Corp-Predecessor [Member]	Apr. 30, 2012 Customer relationships [Member]	Dec. 31, 2012 Customer relationships [Member]	Dec. 31, 2012 Customer relationships [Member] TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Apr. 30, 2012 Customer relationships [Member] TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Apr. 30, 2012 Customer relationships [Member] TransUnion Corp-Predecessor [Member]	Dec. 31, 2011 Customer relationships [Member] TransUnion Corp-Predecessor [Member]	Apr. 30, 2012 Trademarks, copyrights and patents [Member]	Dec. 31, 2012 Trademarks, copyrights and patents [Member]	Dec. 31, 2012 Trademarks, copyrights and patents [Member] TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Apr. 30, 2012 Trademarks, copyrights and patents [Member] TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Apr. 30, 2012 Trademarks, copyrights and patents [Member] TransUnion Corp-Predecessor [Member]	Dec. 31, 2011 Trademarks, copyrights and patents [Member] TransUnion Corp-Predecessor [Member]	Dec. 31, 2012 Noncompete agreements [Member] TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Apr. 30, 2012 Noncompete agreements [Member] TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Apr. 30, 2012 Noncompete agreements [Member] TransUnion Corp-Predecessor [Member]	Dec. 31, 2011 Noncompete agreements [Member] TransUnion Corp-Predecessor [Member]	Dec. 31, 2012 Internal Use Software [Member] Maximum [Member]	Dec. 31, 2012 Internal Use Software [Member] Minimum [Member]
Intangible Assets (Textual) [Abstract]
Purchase accounting fair value increase adjustments													$ 705.1				$ 261.2						$ 256.1						$ 537.0				$ 3.3
Accumulated amortization					86.6		374.6				33.9	0		205.3	34.8	0		148.4			10.3	0		13.8			7.4	0		6.5	0.2	0		0.6
Amortizable intangibles estimated Useful lives	40 years	3 years							15 years	15 years									20 years	20 years					40 years	40 years									7 years	3 years
Amortization expense for intangible assets			$ 88.3	$ 88.3		$ 16.8	$ 46.0	$ 42.0

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(2)

-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.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(1)

-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.

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- Definition

Amount of increase (decrease) to assets, excluding financial assets and goodwill, lacking physical substance with a finite life for foreign currency translation adjustments and purchase accounting adjustments.

+ References

No definition available.

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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