Separate Account Assets and Liabilities - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Separate Accounts Disclosure [Abstract]
Separate account assets	$ 237,319	$ 236,496

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

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant