Other Current Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012 TransUnion Holding Company, Inc. [Member]	Dec. 31, 2012 TransUnion Corp-Successor [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member]
Other current assets
Prepaid expenses	$ 33.8	$ 33.8	$ 37.1
Deferred financing fees	5.7		3.8
Deferred income tax assets	36.3	18.9	8.7
Income taxes receivable	4.7	3.8	1.9
Other	2.2	2.2	3.9
Total other current assets	$ 82.7	$ 58.7	$ 55.4

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences expected to be realized or consumed within one year or operating cycle, if longer.

+ References+ Details

Carrying amount due within one year of the balance sheet date (or one operating cycle, if longer) from tax authorities as of the balance sheet date representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes.

+ References+ Details

- Definition

Sum of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer.

+ References+ Details