Real Estate and Real Estate Partnerships (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Real Estate [Line Items]
Investment real estate	$ 2,235	$ 755
Real estate partnerships	2,757	2,856
Total real estate and real estate partnerships	4,992	3,611
Real estate, held-for-sale	$ 12	$ 0
Real estate \| Industry Sector
Real Estate [Line Items]
Percentage	100.00%	100.00%
Hotel
Real Estate [Line Items]
Investment real estate	$ 135	$ 14
Hotel \| Real estate \| Industry Sector
Real Estate [Line Items]
Percentage	6.00%	2.00%
Industrial
Real Estate [Line Items]
Investment real estate	$ 14	$ 65
Industrial \| Real estate \| Industry Sector
Real Estate [Line Items]
Percentage	1.00%	9.00%
Land
Real Estate [Line Items]
Investment real estate	$ 288	$ 37
Land \| Real estate \| Industry Sector
Real Estate [Line Items]
Percentage	13.00%	5.00%
Office
Real Estate [Line Items]
Investment real estate	$ 208	$ 358
Office \| Real estate \| Industry Sector
Real Estate [Line Items]
Percentage	9.00%	47.00%
Retail
Real Estate [Line Items]
Investment real estate	$ 186	$ 218
Retail \| Real estate \| Industry Sector
Real Estate [Line Items]
Percentage	8.00%	29.00%
Apartments
Real Estate [Line Items]
Investment real estate	$ 47	$ 60
Apartments \| Real estate \| Industry Sector
Real Estate [Line Items]
Percentage	2.00%	8.00%
Single family residential
Real Estate [Line Items]
Investment real estate	$ 1,342	$ 0
Single family residential \| Real estate \| Industry Sector
Real Estate [Line Items]
Percentage	60.00%	0.00%
Other
Real Estate [Line Items]
Investment real estate	$ 15	$ 3
Other \| Real estate \| Industry Sector
Real Estate [Line Items]
Percentage	1.00%	0.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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