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

Revision of Previously Issued Financial Statements - Summary of Restatement of Net Income Loss Per Share (Detail) - $ / shares	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2021	Sep. 30, 2021
Common Class A [Member]
Class of Stock [Line Items]
Basic and diluted weighted average shares outstanding	32,457,500				27,345,147
Basic and diluted net loss per share, common stock	$ 0.12				$ (0.02)
Common Class B [Member]
Class of Stock [Line Items]
Basic and diluted weighted average shares outstanding	7,906,250				7,743,819
Basic and diluted net loss per share, common stock	$ 0.12				$ (0.02)
Previously Reported [Member] \| Common Class A [Member]
Class of Stock [Line Items]
Basic and diluted weighted average shares outstanding		29,616,045	30,163,095	30,496,324
Previously Reported [Member] \| Common Class B [Member]
Class of Stock [Line Items]
Basic and diluted weighted average shares outstanding		9,695,318	8,611,731	6,875,000
Basic and diluted net loss per share, common stock		$ (1.09)	$ 0.56	$ (0.83)
As Restated [Member] \| Common Class A [Member]
Class of Stock [Line Items]
Basic and diluted weighted average shares outstanding		31,625,000	31,625,000	31,625,000
Basic and diluted net loss per share, common stock		$ (0.27)	$ 0.12	$ (0.15)
As Restated [Member] \| Common Class B [Member]
Class of Stock [Line Items]
Basic and diluted weighted average shares outstanding		7,715,000	7,715,000	7,715,000
Basic and diluted net loss per share, common stock		$ (0.27)	$ 0.12	$ (0.15)