v2.4.0.6

Purchased Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012 TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [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]	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]	Dec. 31, 2011 Internally developed software [Member] TransUnion Corp-Predecessor [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]	Dec. 31, 2011 Customer relationships [Member] TransUnion Corp-Predecessor [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]	Dec. 31, 2011 Trademarks, copyrights and patents [Member] TransUnion Corp-Predecessor [Member]	Dec. 31, 2012 Noncompete and other agreements [Member] TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Apr. 30, 2012 Noncompete and other agreements [Member] TransUnion Corp-Successor [Member] TransUnion Holding Company, Inc. [Member]	Dec. 31, 2011 Noncompete and other agreements [Member] TransUnion Corp-Predecessor [Member]
Intangible assets
Gross	$ 1,998.2	$ 605.4	$ 763.6		$ 272.4	$ 380.3		$ 241.8	$ 306.7		$ 60.0	$ 545.5		$ 24.4	$ 2.1		$ 6.8
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)
Total future amortization expense	$ 1,911.6	$ 230.8	$ 729.7		$ 67.1	$ 345.5		$ 93.4	$ 296.4		$ 46.2	$ 538.1		$ 17.9	$ 1.9		$ 6.2

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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



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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

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Amount before 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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Amount after 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



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-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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