Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
Movement in valuation allowances and reserves | |||
Deferred Tax Assets, Valuation Allowance | $ 59.2 | $ 46.7 | |
Allowance for doubtful accounts [Member] | |||
Movement in valuation allowances and reserves | |||
Balance at Beginning of Year | 4.2 | 2.4 | $ 0.7 |
Charged to Costs and Expenses | 4.3 | 3.2 | 3.2 |
Charged to Other Accounts | 0.0 | 0.0 | 0.0 |
Deductions | (2.3) | (1.4) | (1.5) |
Balance at End of Year | 6.2 | 4.2 | 2.4 |
Allowance for deferred tax assets [Member] | |||
Movement in valuation allowances and reserves | |||
Balance at Beginning of Year | 46.7 | 42.1 | 25.9 |
Charged to Costs and Expenses | 13.6 | 5.3 | 19.5 |
Charged to Other Accounts | 0.0 | 0.0 | 0.0 |
Deductions | (1.1) | (0.7) | (3.3) |
Balance at End of Year | 59.2 | 46.7 | 42.1 |
TransUnion Parent [Member] | |||
Valuation and Qualifying Accounts Disclosure [Line Items] | |||
Proceeds from Dividends Received | $ 0.0 | $ 45.1 | $ 90.3 |