Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2020	Feb. 22, 2021	Jun. 30, 2020
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-13585
Entity Registrant Name	CORELOGIC, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	95-1068610
Entity Address, Address Line One	40 Pacifica
Entity Address, City or Town	Irvine
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92618
City Area Code	949
Local Phone Number	214-1000
Entity Well Known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Periods Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 5,303,236,199
Common stock, shares outstanding		73,152,328
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement with respect to the 2020 annual meeting of the stockholders are incorporated by reference in Part III of this report. The definitive proxy statement or an amendment to this Form 10-K will be filed no later than 120 days after the close of the registrant’s fiscal year.
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Central Index Key	0000036047
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, $0.00001 par value
Trading Symbol	CLGX
Security Exchange Name	NYSE
Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	Preferred Stock Purchase Rights
Trading Symbol	CLGX
Security Exchange Name	NYSE