Separate Accounts (Aggregate FV of Assets Supporting Separate Accounts) (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Separate Account, Liability [Line Items]
Separate account assets	$ 85,691	$ 85,528
Other assets
Separate Account, Liability [Line Items]
Separate account assets	2	3
Equity securities
Separate Account, Liability [Line Items]
Separate account assets	85,484	85,314
Fixed maturity securities
Separate Account, Liability [Line Items]
Separate account assets	196	211
Cash and cash equivalents
Separate Account, Liability [Line Items]
Separate account assets	$ 9	$ 0

Amount of asset at fair value held for benefit of separate account policyholder.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant