Investments (Residential Mortgage Loans By Year Of Origination) (Details) - Residential [Member] - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current year	$ 423	$ 469
Originated in prior year	547	131
Originated in two years prior	97	210
Originated in three years prior	152	109
Originated in four years prior	74
Total	1,293	919
Performing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current year	423	467
Originated in prior year	542	129
Originated in two years prior	95	189
Originated in three years prior	134	104
Originated in four years prior	70
Total	1,264	889
Nonperforming [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current year		2
Originated in prior year	5	2
Originated in two years prior	2	21
Originated in three years prior	18	5
Originated in four years prior	4
Total	$ 29	$ 30