Income Taxes Other (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended						3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2010 FAFC [Member] FAFC Indemnification Under Tax Sharing Agreement Member [Member]	Dec. 31, 2010 Corelogic [Member] FAFC Indemnification Under Tax Sharing Agreement Member [Member]	Dec. 31, 2010 Liable Party [Member] FAFC Indemnification Under Tax Sharing Agreement Member [Member]	Mar. 31, 2010 Dorado Network Systems [Member]	Dec. 31, 2011 Employer And Litigation Services [Member]	Dec. 31, 2011 CoreLogic India [Member]
Income Taxes [Line Items]
Reversal of Deferred Income Taxes Of Equity Method Investment							$ 12.3
Income (Loss) from Continuing Operations before Income Taxes, Domestic	140.3	140.1	174.8
Income (Loss) from Continuing Operations before Income Taxes, Foreign	(1.4)	12.8	7.1
Operating Loss Carryforwards	320.0
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	8.6
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	311.4
Deferred Tax Liabilities, Undistributed Foreign Earnings	18.9
Tax Sharing Agreement Percentage Of Taxes Liable				75.00%	25.00%	100.00%
Pre-closing Liability for Uncertain Tax Position Under Indemnificaiton Obligation, Net of Tax Benefits								$ 0.7	$ 1.1