v2.4.0.6
Purchased Intangible Assets (Details 1) (TransUnion Corp-Successor [Member], TransUnion Holding Company, Inc. [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
TransUnion Corp-Successor [Member] | TransUnion Holding Company, Inc. [Member]
 
Estimated future amortization expense related to purchased intangible  
2013 $ 135.1
2014 136.4
2015 135.2
2016 134.6
2017 132.9
Thereafter 1,237.4
Total future amortization expense $ 1,911.6