Insurance Liabilities (Reconciliation of Policyholder Account Balances) (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2025
Policyholder Account Balance [Line Items]
Policyholder Account Balance	$ 89,076	$ 88,046
Rollforwards Total
Policyholder Account Balance [Line Items]
Policyholder Account Balance	78,411	76,350
Funding agreements classified as investment contracts
Policyholder Account Balance [Line Items]
Policyholder Account Balance	9,131	10,174
Institutional group annuities
Policyholder Account Balance [Line Items]
Policyholder Account Balance	660	566
Other investment contract liabilities
Policyholder Account Balance [Line Items]
Policyholder Account Balance	$ 874	$ 956

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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