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Business, Basis of Presentation, and Significant Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Significant Accounting Policies [Line Items]
Ownership percentage at which fair value option is elected	3.00%
Number of predecessors	2
Equity	$ 2,380	$ 22,546	$ 22,181	$ 20,140	$ 14,141
Fixed maturity securities, amortized cost	131,422		106,859
Cumulative Effect, Period of Adoption, Adjustment
Significant Accounting Policies [Line Items]
Equity					(125)
Retained earnings (accumulated deficit)
Significant Accounting Policies [Line Items]
Equity	$ (4,892)	$ 0	11,033	$ 8,073	6,939
Retained earnings (accumulated deficit) | Cumulative Effect, Period of Adoption, Adjustment
Significant Accounting Policies [Line Items]
Equity					$ (117)
Commercial Real Estate Portfolio Segment [Member]
Significant Accounting Policies [Line Items]
Valuation allowance related to residential mortgage loans			$ 17,064
Nonparticipating Life Insurance Policy | Minimum
Significant Accounting Policies [Line Items]
Investment yield assumption for non-participation contracts	2.30%
Nonparticipating Life Insurance Policy | Maximum
Significant Accounting Policies [Line Items]
Investment yield assumption for non-participation contracts	6.60%

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