Segment Information (Total Revenues of Reportable Segments) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 4,878	$ 4,156	$ 11,215	$ 8,407
Other Segments | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	2,708	2,210	6,931	4,537
Other Segments | CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	490	399	903	785
Other Segments | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	756	581	1,492	1,210
Other Segments | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	880	888	1,814	1,748
Corporate and Other [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	44	78	75	127
Life Insurance Product Line [Member] | Other Segments | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	2,044	1,932	3,958	3,744
Life Insurance Product Line [Member] | Other Segments | CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	389	373	775	732
Life Insurance Product Line [Member] | Other Segments | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	524	451	1,049	911
Life Insurance Product Line [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	778	752	1,569	1,481
Nontraditional Long-Duration Contracts [Member] | Other Segments | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	664	278	2,973	793
Nontraditional Long-Duration Contracts [Member] | Other Segments | CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	101	26	128	53
Nontraditional Long-Duration Contracts [Member] | Other Segments | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	232	130	443	299
Nontraditional Long-Duration Contracts [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 102	$ 136	$ 245	$ 267