Segment Information (Total Assets of Reportable Segments) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 87,422	$ 84,904
Corporate and Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	2,469	1,942
Other Segments | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	46,644	47,815
Other Segments | CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	5,157	5,003
Other Segments | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	9,896	8,867
Other Segments | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	23,256	21,277
Life Insurance Product Line [Member] | Other Segments | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	22,527	22,612
Life Insurance Product Line [Member] | Other Segments | CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,936	4,826
Life Insurance Product Line [Member] | Other Segments | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	3,649	3,652
Life Insurance Product Line [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	9,894	9,254
Nontraditional Long-Duration Contracts [Member] | Other Segments | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	24,117	25,203
Nontraditional Long-Duration Contracts [Member] | Other Segments | CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	221	177
Nontraditional Long-Duration Contracts [Member] | Other Segments | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	6,247	5,215
Nontraditional Long-Duration Contracts [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 13,362	$ 12,023