Loans Receivable - 2023 Loans Receivable Transactions (Details) $ in Millions	1 Months Ended
	Oct. 31, 2023 USD ($)	May 31, 2023 USD ($) loan	Apr. 30, 2023 USD ($) loan	Feb. 28, 2023 USD ($) loan	Dec. 31, 2022 loan	Nov. 30, 2022 loan	May 31, 2022 loan	Sep. 30, 2021 USD ($)	Jul. 31, 2021 USD ($)	May 31, 2021 loan
Secured Mortgage Loans
Loans Receivable:
Proceeds from the collection of loans receivable				$ 102
Other | Secured Mortgage Loans
Loans Receivable:
Secured loan | loan		1	1	1	4	1	1			1
Proceeds from the collection of loans receivable	$ 21	$ 21	$ 14	$ 35				$ 15	$ 8
Other | Secured Mortgage Loans | Secured Overnight Financing Rate (SOFR)
Loans Receivable:
Loans receivable, conversion of basis spread on variable rate		0.10%			0.11%
Other | Secured Mortgage Loans 1
Loans Receivable:
Secured loan | loan		2
Proceeds from the collection of loans receivable		$ 12