Commitments and Contingencies - Narrative (Details) $ / shares in Units, € in Millions, $ in Millions			1 Months Ended		9 Months Ended	12 Months Ended
	Dec. 21, 2021 USD ($) consecutive_year	Nov. 01, 2021 USD ($)	Feb. 28, 2022 USD ($)	Feb. 28, 2021	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2022 EUR (€) shares	Sep. 02, 2022 $ / shares
Other Commitments [Line Items]
Outstanding letters of credit						$ 12.2
Reimbursement of payroll expenses	$ 0.4	$ 5.0
Government assistance term	7 years	10 years
Receive grant minimum percentage		80.00%
Number of consecutive years \| consecutive_year	2
Grant issued						$ 0.3
Grant estimated paid out period						2 years
IDA
Other Commitments [Line Items]
Grants receivable \| €									€ 6.4
Government assistance estimated expenditure cost \| €									€ 59.7
Selling, General and Administrative Expenses
Other Commitments [Line Items]
Grants receivable						$ 0.1
CVS Pharmacy, Inc.
Other Commitments [Line Items]
Purchase price (in dollars per share) \| $ / shares						$ 30.50				$ 30.50
Stock Appreciation Rights (SARs) \| Share-based Payment Arrangement, Nonemployee
Other Commitments [Line Items]
Award requisite service period					2 years 6 months			3 years
Expiration period of award								20 years
Grant date fair value					$ 36.6	$ 69.9	$ 76.2	$ 15.2
Maximum aggregate amount of cash payments in any calendar quarter						25.0
Maximum aggregate value of award						118.5
Synthetic Equity Units
Other Commitments [Line Items]
Weighted average price volume period				30 days
Synthetic Equity Units \| Selling, General and Administrative Expenses
Other Commitments [Line Items]
Equity-based compensation						$ 0.9	$ 1.1
Synthetic Equity Units, Time-Based Vesting
Other Commitments [Line Items]
Units outstanding (in shares) \| shares						82,883			82,883
Related Reciprocal Letter of Credit Provided
Other Commitments [Line Items]
Letters of credit released			$ 8.8
Leased Properties
Other Commitments [Line Items]
Outstanding letters of credit						$ 3.0
Leased Properties \| Centers for Medicare and Medicaid Services (CMS) \| Discontinued Operations, Disposed of by Means Other than Sale, Abandonment
Other Commitments [Line Items]
Outstanding letters of credit						9.2
Workers Compensation Obligations
Other Commitments [Line Items]
Outstanding letters of credit						$ 0.4

Signify Health, Inc. 10-K