Supplemental Disclosures of Cash Flow Data (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Non-cash transactions:
Establishment of funds withheld liability in connection with a reinsurance transaction	$ (6)	$ (7,361)
Extraordinary dividend to LNC in the form of fixed maturity AFS securities, mortgage loans on real estate and accrued investment income	0	(929)
Non-cash dividend to Lincoln National Corporation for settlement of an inter-company tax receivable	(207)	0
Net increase (decrease) in fixed maturity AFS securities and accrued investment income in connection with reinsurance activity	$ (90)	$ 767