|
Goodwill (Details) (USD $)
In Millions, unless otherwise specified |
4 Months Ended | 12 Months Ended | 8 Months Ended | 12 Months Ended | 8 Months Ended | 4 Months Ended | 12 Months Ended | 8 Months Ended | 8 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2012
TransUnion Holding Company, Inc. [Member]
|
Apr. 30, 2012
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2011
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2010
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2012
TransUnion Corp-Successor [Member]
|
Dec. 31, 2012
TransUnion Corp-Successor [Member]
TransUnion Holding Company, Inc. [Member]
|
Dec. 31, 2012
TransUnion Corp-Successor [Member]
TransUnion Holding Company, Inc. [Member]
|
Dec. 31, 2011
USIS [Member]
TransUnion Corp-Predecessor [Member]
|
Apr. 30, 2012
USIS [Member]
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2012
USIS [Member]
TransUnion Corp-Successor [Member]
TransUnion Holding Company, Inc. [Member]
|
Apr. 30, 2012
International [Member]
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2011
International [Member]
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2012
International [Member]
TransUnion Corp-Successor [Member]
TransUnion Holding Company, Inc. [Member]
|
Apr. 30, 2012
Interactive [Member]
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2011
Interactive [Member]
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2010
Interactive [Member]
TransUnion Corp-Predecessor [Member]
|
Dec. 31, 2012
Interactive [Member]
TransUnion Corp-Successor [Member]
TransUnion Holding Company, Inc. [Member]
|
|
| Changes in the carrying amount of goodwill | |||||||||||||||||
| Beginning balance | $ 1,804.2 | $ 275.2 | $ 223.7 | $ 1,804.2 | $ 119.5 | $ 147.5 | $ 81.8 | $ 58.3 | $ 45.9 | $ 45.9 | $ 45.9 | ||||||
| Acquisitions | 0.8 | 60.6 | 9.9 | 28.0 | 0.8 | 32.6 | 9.9 | ||||||||||
| Foreign exchange rate adjustment | 1.8 | (9.1) | (15.5) | 1.8 | (9.1) | (15.5) | |||||||||||
| Tax deductible goodwill adjustment | (10.3) | 6.7 | (10.3) | 6.7 | |||||||||||||
| Purchase accounting adjustments related to acquisition of TransUnion Corp | 1,534.0 | 987.8 | 455.3 | 90.9 | |||||||||||||
| Additional purchase price related to acquisition of Brazil subsidiary | 1.8 | 1.8 | |||||||||||||||
| Goodwill related to disposed equity method investment | (0.2) | (0.2) | |||||||||||||||
| Impairment of goodwill related to equity method investment | 0 | 0 | 0 | ||||||||||||||
| Ending balance | $ 1,804.2 | $ 267.5 | $ 275.2 | $ 223.7 | $ 1,804.2 | $ 1,804.2 | $ 1,804.2 | $ 147.5 | $ 147.5 | $ 1,135.3 | $ 74.1 | $ 81.8 | $ 532.1 | $ 45.9 | $ 45.9 | $ 45.9 | $ 136.8 |