Investments (Mortgage Loans Allowance for Credit Loss Rollforward by Portfolio Segment) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	$ 800	$ 721
Provision (release)	447	120
Charge-offs, net of recoveries	(51)	(35)
Balance, end of period	1,196	806
Commercial Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	537	367
Provision (release)	410	155
Charge-offs, net of recoveries	(51)	(28)
Balance, end of period	896	494
Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	179	182
Provision (release)	27	(41)
Charge-offs, net of recoveries	0	0
Balance, end of period	206	141
Agricultural Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of period	84	172
Provision (release)	10	6
Charge-offs, net of recoveries	0	(7)
Balance, end of period	$ 94	$ 171