| Cover | Aug. 17, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Aug. 17, 2021 |
| Entity Registrant Name | MultiPlan Corporation |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39228 |
| Entity Tax Identification Number | 84-3536151 |
| Entity Address, Address Line One | 115 Fifth Avenue |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10003 |
| City Area Code | 212 |
| Local Phone Number | 780-2000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001793229 |
| Amendment Flag | false |
| Common Class A | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Shares of Class A Common Stock, $0.0001 par value per share |
| Trading Symbol | MPLN |
| Security Exchange Name | NYSE |
| Warrant | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Warrants |
| Trading Symbol | MPLN.WS |
| Security Exchange Name | NYSE |
