Cover Page - USD ($)	12 Months Ended
Cover Page - USD ($)	Dec. 31, 2020	Apr. 27, 2021	Jun. 30, 2020
Document Information [Line Items]
Document Type	10-K/A
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 Reporting 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
Entity Common Stock, Shares Outstanding		73,618,482
Documents Incorporated by Reference	None.
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	true
Amendment Description	EXPLANATORY NOTE This Amendment No. 1 to Form 10-K (this “Amended Report”) amends the original Annual Report on Form 10-K of CoreLogic, Inc. (“CoreLogic,” the “Company,” “we,” “our,” or “us”) for the year ended December 31, 2020, originally filed with the Securities and Exchange Commission (the “SEC”) on March 1, 2021 (the “Original Report”). This Amended Report amends and restates the Original Report to include the information required by Part III—Item 10, Item 11, Item 12, Item 13, and Item 14 of Form 10-K. In addition, in accordance with Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), Item 15(a)(3) of Part IV of the Original Report is being amended and restated solely to include as exhibits new certifications by the Company’s principal executive officer and principal financial officer. Except as set forth in this Amended Report, no other changes have been made to the Original Report. Unless expressly stated, this Amended Report does not reflect events occurring after the filing of the Original Report, and it does not modify or update in any way the disclosures contained in the Original Report, which speak as of the date of the Original Report. Accordingly, this Amended Report should be read in conjunction with the Original Report, and the Company’s other SEC filings subsequent to the filing of the Original Report.
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

CORELOGIC, INC. 10-K/A