Investments (Residential Mortgage Loans By Year Of Origination) (Details) - Residential [Member] - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current year	$ 232	$ 469
Originated in prior year	559	131
Originated in two years prior	103	210
Originated in three years prior	163	109
Originated in four years prior	80
Total	1,137	919
Performing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current year	232	467
Originated in prior year	557	129
Originated in two years prior	100	189
Originated in three years prior	145	104
Originated in four years prior	77
Total	1,111	889
Nonperforming [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Originated in current year		2
Originated in prior year	2	2
Originated in two years prior	3	21
Originated in three years prior	18	5
Originated in four years prior	3
Total	$ 26	$ 30