Other Policyholder Funds and Benefits Payable (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Other policyholder funds and benefits payable	$ 647	$ 664	$ 658
Universal Life
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Other policyholder funds and benefits payable	228	242	$ 232	$ 253
Policyholder Account Balance, Premium Received	6	7
Policyholder Account Balance, Policy Charge	10	12
Policyholder Account Balance, Surrender and Withdrawal	2	2
Policyholder Account Balance, Benefit Payment	3	10
Policyholder Account Balance, Interest Expense	$ 5	$ 6
Policyholder Account Balance, Weighted Average Crediting Rate	4.20%	4.20%
Policyholder Account Balance, Net Amount at Risk	$ 950	$ 1,032
Policyholder Account Balance, Cash Surrender Value	$ 226	239
Universal Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 to 0499 | Minimum
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Policyholder Account Balance, Guaranteed Minimum Credit Rating	4.00%
Universal Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 to 0499 | Maximum
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Policyholder Account Balance, Guaranteed Minimum Credit Rating	5.00%
Universal Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 to 0499 | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Other policyholder funds and benefits payable	$ 227	240
Short-Duration Insurance, Other
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Other policyholder funds and benefits payable	$ 419	$ 422