| Cover Page - shares | 3 Months Ended | |
| Mar. 31, 2022 | May 27, 2022 | |
| Document Information [Line Items] | ||
| Document Type | 10-Q/A | |
| Document Quarterly Report | true | |
| Document Period End Date | Mar. 31, 2022 | |
| Document Transition Report | false | |
| Entity File Number | 001-40028 | |
| Entity Registrant Name | Signify Health, Inc. | |
| Entity Incorporation, State or Country Code | DE | |
| Entity Tax Identification Number | 85-3481223 | |
| Entity Address, Address Line One | 800 Connecticut Avenue | |
| Entity Address, City or Town | Norwalk | |
| Entity Address, State or Province | CT | |
| Entity Address, Postal Zip Code | 06854 | |
| City Area Code | 203 | |
| Local Phone Number | 541-4600 | |
| Title of 12(b) Security | Class A common stock, par value $0.01 per Share | |
| Trading Symbol | SGFY | |
| Security Exchange Name | NYSE | |
| Entity Current Reporting Status | Yes | |
| Entity Interactive Data Current | Yes | |
| Entity Filer Category | Non-accelerated Filer | |
| Entity Small Business | false | |
| Entity Emerging Growth Company | true | |
| Entity Ex Transition Period | false | |
| Entity Shell Company | false | |
| Entity Central Index Key | 0001828182 | |
| Amendment Flag | true | |
| Document Fiscal Period Focus | Q1 | |
| Document Fiscal Year Focus | 2022 | |
| Current Fiscal Year End Date | --12-31 | |
| Amendment Description | EXPLANATORY NOTEThe purpose of this Amendment (the “Amendment”) to our Form 10-Q for the quarter ended March 31, 2022 (the “Form 10-Q”), as filed with the Securities and Exchange Commission (the “SEC”) on May 5, 2022, is solely to correct an inadvertent omission of certain language from paragraph 4 of the Exhibit 31.1 and Exhibit 31.2 certifications originally filed with our Form 10-Q.This Amendment contains only the Cover Page, this Explanatory Note and Exhibits 31.1 and 31.2. No other changes have been made to the Form 10-Q as filed with the SEC on May 5, 2022. This Amendment speaks as of the original filing date of the Form 10-Q, does not reflect events that may have occurred subsequent to the original filing date, and does not modify or update in any way disclosures made in the original Form 10-Q. Accordingly, this Amendment should be read in conjunction with the Form 10-Q and our other filings with the SEC. | |
| Class A Common Stock | ||
| Document Information [Line Items] | ||
| Entity Common Stock, Shares Outstanding | 176,364,619 | |
| Class B Common Stock | ||
| Document Information [Line Items] | ||
| Entity Common Stock, Shares Outstanding | 57,515,043 |
