P3 Health Partners Inc. Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Fair Value Measurement Inputs and Valuation Techniques (Detail) - Private Placement Warrants [Member]	Mar. 31, 2021	Feb. 12, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and Rights Outstanding, Measurement Input	9.73	9.65
Risk-free interest rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and Rights Outstanding, Measurement Input	0.0098	0.0056
Trading days per year [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and Rights Outstanding, Measurement Input	252	252
Expected volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and Rights Outstanding, Measurement Input	0.111	0.178
Exercise price [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Warrants and Rights Outstanding, Measurement Input	11.50	11.50