v2.4.0.6

Debt (Details 2) (USD $) In Millions, unless otherwise specified | 10 Months Ended | 12 Months Ended | 8 Months Ended | 4 Months Ended | 12 Months Ended | 4 Months Ended | 12 Months Ended | 4 Months Ended | 12 Months Ended | 4 Months Ended | 12 Months Ended | 4 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] | Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] | Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] Senior secured term loan [Member] | Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] Senior secured revolving line of credit [Member] | Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] 11.375% notes [Member] | Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] 9.625% notes [Member] | Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] 8.125% notes [Member] | Dec. 31, 2012 TransUnion Holding Company, Inc. [Member] Other debt [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] Senior secured term loan [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] Senior secured revolving line of credit [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] 11.375% notes [Member] | Dec. 31, 2012 TransUnion Corp-Successor [Member] Other debt [Member] | Apr. 30, 2012 TransUnion Corp-Predecessor [Member] | Dec. 31, 2011 TransUnion Corp-Predecessor [Member] | Dec. 31, 2010 TransUnion Corp-Predecessor [Member] | Apr. 30, 2012 TransUnion Corp-Predecessor [Member] Senior secured term loan [Member] | Dec. 31, 2011 TransUnion Corp-Predecessor [Member] Senior secured term loan [Member] | Dec. 31, 2010 TransUnion Corp-Predecessor [Member] Senior secured term loan [Member] | Apr. 30, 2012 TransUnion Corp-Predecessor [Member] Senior secured revolving line of credit [Member] | Dec. 31, 2011 TransUnion Corp-Predecessor [Member] Senior secured revolving line of credit [Member] | Dec. 31, 2010 TransUnion Corp-Predecessor [Member] Senior secured revolving line of credit [Member] | Apr. 30, 2012 TransUnion Corp-Predecessor [Member] 11.375% notes [Member] | Dec. 31, 2011 TransUnion Corp-Predecessor [Member] 11.375% notes [Member] | Dec. 31, 2010 TransUnion Corp-Predecessor [Member] 11.375% notes [Member] | Apr. 30, 2012 TransUnion Corp-Predecessor [Member] Other debt [Member] | Dec. 31, 2011 TransUnion Corp-Predecessor [Member] Other debt [Member] | Dec. 31, 2010 TransUnion Corp-Predecessor [Member] Other debt [Member]
Interest Expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and other interest |  | $ 133.7 | $ 35.0 |  | $ 48.9 | $ 44.8 | $ 5.3 | $ (0.3) | $ 83.6 | $ 35.0 |  | $ 48.9 | $ (0.3) | $ 39.4 | $ 122.5 | $ 84.6 | $ 15.1 | $ 47.7 | $ 35.6 |  |  | $ 0.1 | $ 24.5 | $ 73.4 | $ 39.8 | $ (0.2) | $ 1.4 | $ 9.1
Amortized interest | 2.1 | 2.1 |  |  |  | 1.9 | 0.2 |  |  |  |  |  |  | 3.9 | 4.2 | 17.1 | 0.5 | 2.2 | 3.5 |  |  |  | 0.6 | 1.7 | 0.8 |  |  | 1.2
Amortized purchase accounting fair value adjustment premium |  |  |  |  | (10.8) |  |  |  |  |  |  | (10.8) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total interest expense |  | 125.0 | 35.0 |  | 38.1 | 46.7 | 5.5 | (0.3) | 72.8 | 35.0 |  | 38.1 | (0.3) | 40.5 | 126.4 | 90.1 | 15.6 | 49.9 | 39.1 |  |  | 0.1 | 25.1 | 75.1 | 40.6 | (0.2) | 1.4 | 10.3
Total amortized discount / premium | $ (10.8) | $ (10.8) |  |  |  |  |  |  | $ (10.8) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Amortized for purchase accounting fair value adjustment. + References No definition available. + Details
Name: | tcu_AmortizedForPurchaseAccountingFairValueAdjustment
Namespace Prefix: | tcu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
Name: | us-gaap_AmortizationOfDebtDiscountPremium
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 8 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 + Details
Name: | us-gaap_AmortizationOfFinancingCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 34 -Paragraph 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_InterestExpenseDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_InterestExpenseDebtAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 + Details
Name: | us-gaap_InterestExpenseDebtExcludingAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration