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Quarterly Financial Data (Unaudited) (Details 1) (USD $) In Millions, unless otherwise specified | 8 Months Ended | 4 Months Ended | 12 Months Ended | 2 Months Ended | 3 Months Ended | 1 Months Ended | 3 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 TransUnion Corp-Successor [Member] | Apr. 30, 2012 TransUnion Corp-Predecessor [Member] | Dec. 31, 2011 TransUnion Corp-Predecessor [Member] | Dec. 31, 2010 TransUnion Corp-Predecessor [Member] | Jun. 30, 2012 TransUnion Corp [Member] TransUnion Corp-Successor [Member] | Dec. 31, 2012 TransUnion Corp [Member] TransUnion Corp-Successor [Member] | Sep. 30, 2012 TransUnion Corp [Member] TransUnion Corp-Successor [Member] | Apr. 30, 2012 TransUnion Corp [Member] TransUnion Corp-Predecessor [Member] | Mar. 31, 2012 TransUnion Corp [Member] TransUnion Corp-Predecessor [Member] | Dec. 31, 2011 TransUnion Corp [Member] TransUnion Corp-Predecessor [Member] | Sep. 30, 2011 TransUnion Corp [Member] TransUnion Corp-Predecessor [Member] | Jun. 30, 2011 TransUnion Corp [Member] TransUnion Corp-Predecessor [Member] | Mar. 31, 2011 TransUnion Corp [Member] TransUnion Corp-Predecessor [Member]
Summary of quarterly financial data |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  | $ 190.9 | $ 284.4 | $ 291.7 | $ 92.4 | $ 280.6 | $ 253.0 | $ 267.6 | $ 257.5 | $ 245.9
Operating income | 142.1 | (0.2) | 252.7 | 216.1 | 37.0 | 43.6 | 61.6 | (65.8) | 65.6 | 64.3 | 72.8 | 60.5 | 55.1
Income (loss) from continuing operations |  |  |  |  |  |  |  |  |  | 18.0 | 29.3 | 25.2 | (23.3)
Discontinued operations, net of tax |  |  | (0.5) | 8.2 |  |  |  |  |  |  |  | (0.3) | (0.1)
Net income (loss) | 47.9 | (52.4) | 48.8 | 44.9 | 10.8 | 14.1 | 23.0 | (64.5) | 12.1 | 18.0 | 29.3 | 24.9 | (23.4)
Net income (loss) attributable to TransUnion Corp. | $ 43.0 | $ (54.9) | $ 40.8 | $ 36.6 | $ 9.6 | $ 12.6 | $ 20.8 | $ (65.1) | $ 10.2 | $ 16.3 | $ 27.1 | $ 22.9 | $ (25.5)

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