Investments (Mortgage Loans Allowances Gross charge-offs by Portfolio Segment) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-offs, net of recoveries	$ 51	$ 35
Commercial Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-offs, net of recoveries	51	$ 28
Commercial Mortgage Loans | OriginatedInCurrentFiscalYear
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-offs, net of recoveries	0
Commercial Mortgage Loans | Originated In Fiscal Year Before Latest Fiscal Year
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-offs, net of recoveries	0
Commercial Mortgage Loans | Originated Two Years Before Latest Fiscal Year
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-offs, net of recoveries	0
Commercial Mortgage Loans | Originated Three Years Before Latest Fiscal Year
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-offs, net of recoveries	0
Commercial Mortgage Loans | Originated Four Years Before Latest Fiscal Year
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-offs, net of recoveries	0
Commercial Mortgage Loans | Originated Five Or More Years Before Latest Fiscal Year
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-offs, net of recoveries	$ 51