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Investments - Detail of equity method investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Schedule of Investments [Line Items]
Investments accounted for using the equity method	$ 2,443		$ 2,421
Equity in earnings of partnerships and similar investments	$ 18	$ 13
Multifamily
Schedule of Investments [Line Items]
Percent of real-estate related investments by property type	88.00%		87.00%
Real estate-related investments
Schedule of Investments [Line Items]
Investments accounted for using the equity method	$ 1,418		$ 1,431
Equity in earnings of partnerships and similar investments	5	17
Private equity
Schedule of Investments [Line Items]
Investments accounted for using the equity method	927		895
Equity in earnings of partnerships and similar investments	10	(6)
Private debt
Schedule of Investments [Line Items]
Investments accounted for using the equity method	98		$ 95
Equity in earnings of partnerships and similar investments	$ 3	$ 2

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Percent of real-estate related investments by property type

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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