Reverse Mortgage Interest [Abstract]

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Reverse Mortgage Interest, Unpaid Principal Balance, Purchase Discount, Net

No definition available.

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Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized

No definition available.

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Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Funded Draws Not Yet Securitized

No definition available.

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Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Home Equity Conversion Mortgage Receivables

No definition available.

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Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Real Estate Owned Related Receivables

No definition available.

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Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Repurchase of Home Equity Conversion Mortgages

No definition available.

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Reverse Mortgage Interests, Net - Unsecuritized Interest (Details) - USD ($) $ in Millions	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Reverse Mortgage Interest [Abstract]
Repurchased HECM loans (exceeds 98% MCA)	$ 804		$ 789
Reverse mortgage interest, unpaid principal balance, unsecuritized, home equity conversion mortgage receivables	244		250
Funded borrower draws not yet securitized	53		64
Real estate owned (“REO”) related receivables	37		14
Purchase discount, net	(127)	$ (129)	(114)	$ (163)	$ (171)	$ (164)
Total unsecuritized interests	$ 1,138		$ 1,117