Operating Segments (Details 3) (USD $) In Millions, unless otherwise specified	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]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member] U.S. Information Services [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member] International [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member] Interactive [Member]	Dec. 31, 2011 TransUnion Corp-Predecessor [Member] Corporate [Member]
Property, plant and equipment, net of accumulated depreciation and amortization, by segment
Property, plant and equipment, net	$ 121.2	$ 55.7	$ 18.4	$ 3.3	$ 43.8	$ 109.0	$ 58.0	$ 26.7	$ 3.3	$ 21.0

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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