Market Risk Benefits (MRB Valuation) (Details)		6 Months Ended
		Jun. 30, 2023	Jun. 30, 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	[1]	4.00%	4.00%
Significant Unobservable Inputs Annuitization Rate	[1]	4.20%	4.40%

[1] The weighted-average lapse and annuitization rates are determined by weighting each treaty's rates by the MRB contract's fair value.