v2.4.0.6

Operating Segments (Details) (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]	Dec. 31, 2010 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]	Dec. 31, 2010 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]	Dec. 31, 2010 TransUnion Corp-Predecessor [Member] International [Member]	Apr. 30, 2012 TransUnion Corp-Predecessor [Member] Interactive [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member] Interactive [Member]	Dec. 31, 2010 TransUnion Corp-Predecessor [Member] Interactive [Member]	Apr. 30, 2012 TransUnion Corp-Predecessor [Member] Corporate [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member] Corporate [Member]	Dec. 31, 2010 TransUnion Corp-Predecessor [Member] Corporate [Member]
Financial information by segments
Revenue	$ 767.0	$ 487.4	$ 157.8	$ 121.8		$ 373.0	$ 1,024.0	$ 956.5	$ 238.1	$ 660.1	$ 636.0	$ 76.6	$ 216.1	$ 195.8	$ 58.3	$ 147.8	$ 124.7
Operating income	$ 142.1	$ 121.9	$ 19.1	$ 48.7	$ (47.6)	$ (0.2)	$ 252.7	$ 216.1	$ 33.2	$ 185.8	$ 177.1	$ 5.3	$ 66.7	$ 62.7	$ 13.0	$ 56.5	$ 37.7	$ (51.7)	$ (56.3)	$ (61.4)

X

- Definition

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

+ References

No definition available.

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X

- Definition

Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

+ 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 210.5-03.1(d))

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



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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