Accounts Payable (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012 TransUnion Holding Company, Inc. [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member]	Dec. 31, 2012 TransUnion Corp-Successor [Member]
Details of accounts payable of TransUnion Holding and TransUnion Corp.
Accounts Payable	$ 78.4	$ 75.1	$ 77.5

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

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

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

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