Other Policyholder Funds and Benefits Payable (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Policyholder Account Balance	$ 638	$ 658	$ 687
Universal Life
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Policyholder Account Balance	223	232	253	$ 277
Policyholder Account Balance, Premium Received	14	15	16
Policyholder Account Balance, Policy Charge	(21)	(23)	(23)
Policyholder Account Balance, Surrender and Withdrawal	(6)	(4)	(9)
Policyholder Account Balance, Benefit Payment	(6)	(20)	(22)
Policyholder Account Balance, Interest Expense	$ 10	$ 11	$ 14
Policyholder Account Balance, Weighted Average Crediting Rate	4.20%	4.20%	4.20%
Policyholder Account Balance, Net Amount at Risk	$ 917	$ 987	$ 1,086
Policyholder Account Balance, Cash Surrender Value	$ 221	229	250
Universal Life | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 to 0499 | Minimum [Member]
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]
Policyholder Account Balance	$ 222	230	251
Short-Duration Insurance, Other [Member]
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Policyholder Account Balance	$ 415	$ 426	$ 434