Other Policyholder Funds and Benefits Payable (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Other policyholder funds and benefits payable	$ 647	$ 677	$ 658
Universal Life
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Other policyholder funds and benefits payable	231	250	$ 232	$ 253
Policyholder Account Balance, Premium Received	3	4
Policyholder Account Balance, Policy Charge	5	6
Policyholder Account Balance, Surrender and Withdrawal	1	1
Policyholder Account Balance, Benefit Payment	1	3
Policyholder Account Balance, Interest Expense	$ 3	$ 3
Policyholder Account Balance, Weighted Average Crediting Rate	4.20%	4.20%
Policyholder Account Balance, Net Amount at Risk	$ 966	$ 1,050
Policyholder Account Balance, Cash Surrender Value	$ 229	$ 247
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate	229	248
Universal Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and Greater
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
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Policyholder Account Balance, Guaranteed Minimum Credit Rating	4.00%
Short-Duration Insurance, Other
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Other policyholder funds and benefits payable	$ 416	$ 427