Investments (FVO Securities and Equity Securities) (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Securities held by CFEs
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI, Cost	$ 815	$ 0
Equity and Trading Securities, FV-NI, Unrealized Gains (Losses)	(15)	0
Debt Securities, Trading, and Equity Securities, FV-NI	800	0
General Account and Other Securities
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI, Cost	200	218
Equity and Trading Securities, FV-NI, Unrealized Gains (Losses)	806	648
Debt Securities, Trading, and Equity Securities, FV-NI	1,006	866
FVO Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI, Cost	1,015	218
Equity and Trading Securities, FV-NI, Unrealized Gains (Losses)	791	648
Debt Securities, Trading, and Equity Securities, FV-NI	1,806	866
Common Stock
Debt and Equity Securities, FV-NI [Line Items]
Equity Securities, FV-NI, Cost	182	170
Equity and Trading Securities, FV-NI, Unrealized Gains (Losses)	44	25
Equity Securities, FV-NI	226	195
Non-redeemable preferred stock
Debt and Equity Securities, FV-NI [Line Items]
Equity Securities, FV-NI, Cost	38	37
Equity and Trading Securities, FV-NI, Unrealized Gains (Losses)	9	7
Equity Securities, FV-NI	47	44
Equity securities
Debt and Equity Securities, FV-NI [Line Items]
Equity Securities, FV-NI, Cost	220	207
Equity and Trading Securities, FV-NI, Unrealized Gains (Losses)	53	32
Equity Securities, FV-NI	$ 273	$ 239

Equity and Trading Securities, FV-NI, Unrealized Gains (Losses)

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