Finance of America Companies Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Fair Value - Summary of Non-Agency Reverse Mortgage Loans (Detail)

Fair Value - Summary of Non-Agency Reverse Mortgage Loans (Detail) - Non Agency Reverse Mortgage Loans [Member]	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Minimum [Member] \| Loan to value [Member]
Fair Value Non Agency Reverse Mortgage Loans Classified As Reverse Mortgage Loans Held For Investment Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Loan to value	2.90%	0.20%
Minimum [Member] \| Home price appreciation [Member]
Fair Value Non Agency Reverse Mortgage Loans Classified As Reverse Mortgage Loans Held For Investment Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Home price appreciation	10.10%	4.60%
Maximum [Member] \| Loan to value [Member]
Fair Value Non Agency Reverse Mortgage Loans Classified As Reverse Mortgage Loans Held For Investment Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Loan to value	68.90%	68.70%
Maximum [Member] \| Home price appreciation [Member]
Fair Value Non Agency Reverse Mortgage Loans Classified As Reverse Mortgage Loans Held For Investment Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Home price appreciation	11.00%	14.00%
Weighted Average [Member] \| Weighted average remaining life in years [Member]
Fair Value Non Agency Reverse Mortgage Loans Classified As Reverse Mortgage Loans Held For Investment Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Weighted-average remaining life in years	10 years 9 months 18 days	9 years 2 months 12 days
Weighted Average [Member] \| Loan to value [Member]
Fair Value Non Agency Reverse Mortgage Loans Classified As Reverse Mortgage Loans Held For Investment Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Loan to value	47.30%	47.80%
Weighted Average [Member] \| Conditional repayment rate [Member]
Fair Value Non Agency Reverse Mortgage Loans Classified As Reverse Mortgage Loans Held For Investment Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Conditional repayment rate	13.10%	14.80%
Weighted Average [Member] \| Loss severity [Member]
Fair Value Non Agency Reverse Mortgage Loans Classified As Reverse Mortgage Loans Held For Investment Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Loss severity	10.00%	10.00%
Weighted Average [Member] \| Home price appreciation [Member]
Fair Value Non Agency Reverse Mortgage Loans Classified As Reverse Mortgage Loans Held For Investment Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Home price appreciation	4.60%	4.40%
Weighted Average [Member] \| Discount rate [Member]
Fair Value Non Agency Reverse Mortgage Loans Classified As Reverse Mortgage Loans Held For Investment Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Discount rate	6.20%	3.60%