Investments - Changes in Allowance for Credit Losses on Mortgage Loans on Real Estate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-year	$ 152
Additions (reductions) from provision for credit loss expense	37	$ 88	$ 16
Balance as of end-of-year	182	152
Mortgage loans on real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-year	152	114	99
Additions (reductions) from provision for credit loss expense	37	88	15
Additions from purchases of PCD mortgage loans on real estate	0	0	0
Reductions for mortgage loans on real estate charged off	(7)	(50)
Balance as of end-of-year	182	152	114
Credit loss benefit (expense)	1	1	(1)
Accrued interest receivable excluded from credit losses	109	94	68
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-year	99
Balance as of end-of-year	113	99
Commercial | Mortgage loans on real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-year	99	86	84
Additions (reductions) from provision for credit loss expense	21	63	2
Additions from purchases of PCD mortgage loans on real estate	0	0	0
Reductions for mortgage loans on real estate charged off	(7)	(50)
Balance as of end-of-year	113	99	86
Residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-year	53
Balance as of end-of-year	69	53
Residential | Mortgage loans on real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of beginning-of-year	53	28	15
Additions (reductions) from provision for credit loss expense	16	25	13
Additions from purchases of PCD mortgage loans on real estate	0	0	0
Reductions for mortgage loans on real estate charged off	0	0
Balance as of end-of-year	$ 69	$ 53	$ 28