Segment Information (Total Assets of Reportable Segments) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 106,000	$ 97,623
Corporate and Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,750	4,993
Other Segments | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	53,843	52,705
Other Segments | CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	5,397	5,330
Other Segments | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	12,138	9,990
Other Segments | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	29,872	24,605
Life Insurance Product Line [Member] | Other Segments | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	24,272	24,320
Life Insurance Product Line [Member] | Other Segments | CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	5,164	5,111
Life Insurance Product Line [Member] | Other Segments | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,486	4,334
Life Insurance Product Line [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	9,886	9,925
Nontraditional Long-Duration Contracts [Member] | Other Segments | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	29,571	28,385
Nontraditional Long-Duration Contracts [Member] | Other Segments | CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	233	219
Nontraditional Long-Duration Contracts [Member] | Other Segments | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	7,652	5,656
Nontraditional Long-Duration Contracts [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 19,986	$ 14,680