Financial Commitments and Contingencies (Details) $ in Millions	Jun. 30, 2026 USD ($)
Funding Agreement Backed Notes Program
Other Commitments [Line Items]
FHLB, maximum amount available	$ 2,700
Debt instrument, face amount	4,000
Other Funding Agreements
Other Commitments [Line Items]
Debt instrument, face amount	815
Municipal Bonds and Collateralized Mortgage Obligations
Other Commitments [Line Items]
FHLB, collateral pledged	780
FHLB, maximum amount available	1,400
Commercial Loan
Other Commitments [Line Items]
FHLB, collateral pledged	1,000
Commitments to purchase, expand, or improve real estate and to fund mortgage loans, private loans and investment funds
Other Commitments [Line Items]
Aggregate commitments	7,100
Long-term lease commitment \| Subsidiaries
Other Commitments [Line Items]
Contractual obligation	$ 122

Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments.

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Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

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