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 Securitized (Detail)

Fair Value - Summary of Non-Agency Reverse Mortgage Securitized (Detail) - Non Agency Reverse Mortgage Securitized [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 Loan Held For Investment Subject To Nonrecourse Debt Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Loan to value	0.10%	0.10%
Minimum [Member] \| Home price appreciation [Member]
Fair Value Non Agency Reverse Mortgage Loan Held For Investment Subject To Nonrecourse Debt 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 Loan Held For Investment Subject To Nonrecourse Debt Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Loan to value	73.00%	64.70%
Maximum [Member] \| Home price appreciation [Member]
Fair Value Non Agency Reverse Mortgage Loan Held For Investment Subject To Nonrecourse Debt 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 Loan Held For Investment Subject To Nonrecourse Debt Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Weighted-average remaining life in years	9 years 3 months 18 days	7 years 6 months
Weighted Average [Member] \| Loan to value [Member]
Fair Value Non Agency Reverse Mortgage Loan Held For Investment Subject To Nonrecourse Debt Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Loan to value	42.90%	43.40%
Weighted Average [Member] \| Conditional repayment rate [Member]
Fair Value Non Agency Reverse Mortgage Loan Held For Investment Subject To Nonrecourse Debt Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Conditional repayment rate	14.70%	18.60%
Weighted Average [Member] \| Loss severity [Member]
Fair Value Non Agency Reverse Mortgage Loan Held For Investment Subject To Nonrecourse Debt 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 Loan Held For Investment Subject To Nonrecourse Debt Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Home price appreciation	4.90%	4.70%
Weighted Average [Member] \| Discount rate [Member]
Fair Value Non Agency Reverse Mortgage Loan Held For Investment Subject To Nonrecourse Debt Measured On Recurring And Nonrecurring Basis Fair Value Measurement [Line Items]
Discount rate	6.20%	3.60%