| Cover Page - USD ($) | 12 Months Ended | ||
| 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 |
