Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Feb. 22, 2018	Jun. 30, 2017
Statement of Financial Position [Abstract]
Entity Registrant Name	CORELOGIC, INC.
Entity Central Index Key	0000036047
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Well Known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Periods Status	Yes
Common stock, shares outstanding		81,486,222
Entity Public Float			$ 3,632,429,159