Separate Accounts (Aggregate FV of Assets Supporting Separate Accounts) (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Separate Account, Liability [Line Items]
Separate account assets	$ 74,551	$ 78,825
Equity securities
Separate Account, Liability [Line Items]
Separate account assets	74,344	78,611
Fixed maturity securities
Separate Account, Liability [Line Items]
Separate account assets	199	211
Cash and cash equivalents
Separate Account, Liability [Line Items]
Separate account assets	6	0
Other assets
Separate Account, Liability [Line Items]
Separate account assets	$ 2	$ 3

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