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Investments - Investments - ACL on Mortgages (Details) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
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Commercial Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	$ (43)	$ (48)	$ (44)	$ (51)	$ (48)
Current period provision	0	0	0	(3)
Financing Receivable, Allowance for Credit Loss, Writeoff	$ 0	$ 0	$ (1)	$ 0

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