Market Risk Benefits (MRB Valuation) (Details)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Minimum
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate	1.00%	3.00%
Significant Unobservable Inputs Annuitization Rate	0.00%	0.00%
Maximum
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate	30.00%	31.00%
Significant Unobservable Inputs Annuitization Rate	100.00%	100.00%
Weighted Average
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Lapse Rate	4.00%	4.40%
Significant Unobservable Inputs Annuitization Rate	4.40%	3.70%