Segment Information (Total Revenues of Reportable Segments) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 5,153	$ 4,050	$ 13,560	$ 11,870
Other Segments | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	3,064	2,147	7,601	6,363
Other Segments | CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	392	386	1,177	1,177
Other Segments | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	631	598	1,841	1,832
Other Segments | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	931	891	2,679	2,358
Corporate and Other [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	135	28	262	140
Life Insurance Product Line [Member] | Other Segments | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,949	1,855	5,693	5,552
Life Insurance Product Line [Member] | Other Segments | CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	366	359	1,098	1,095
Life Insurance Product Line [Member] | Other Segments | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	471	456	1,382	1,372
Life Insurance Product Line [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	801	720	2,282	2,124
Nontraditional Long-Duration Contracts [Member] | Other Segments | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,115	292	1,908	811
Nontraditional Long-Duration Contracts [Member] | Other Segments | CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	26	27	79	82
Nontraditional Long-Duration Contracts [Member] | Other Segments | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	160	142	459	460
Nontraditional Long-Duration Contracts [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 130	$ 171	$ 397	$ 234