| Document and Entity Information | Jun. 04, 2021 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0000036047 |
| Current Fiscal Year End Date | --12-31 |
| Document Type | 8-K |
| Document Period End Date | Jun. 4, 2021 |
| Entity Registrant Name | CORELOGIC, INC. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-13585 |
| 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 | 92618-7471 |
| City Area Code | (949) |
| Local Phone Number | 214-1000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock, $0.00001 par value |
| Trading Symbol | CLGX |
| Security Exchange Name | NYSE |
| Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Preferred Stock Purchase Rights |
| Trading Symbol | CLGX |
| Security Exchange Name | NYSE |
