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Segment Information (Total Assets of Reportable Segments) (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets $ 109,888 $ 97,623
Corporate and Other [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 3,312 4,993
Other Segments | Americas [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 53,568 52,705
Other Segments | CANADA    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 10,914 5,330
Other Segments | EMEA [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 12,297 9,990
Other Segments | Asia Pacific [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 29,797 24,605
Life Insurance Product Line [Member] | Other Segments | Americas [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 24,618 24,320
Life Insurance Product Line [Member] | Other Segments | CANADA    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 5,022 5,111
Life Insurance Product Line [Member] | Other Segments | EMEA [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 4,566 4,334
Life Insurance Product Line [Member] | Other Segments | Asia Pacific [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 8,954 9,925
Nontraditional Long-Duration Contracts [Member] | Other Segments | Americas [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 28,950 28,385
Nontraditional Long-Duration Contracts [Member] | Other Segments | CANADA    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 5,892 219
Nontraditional Long-Duration Contracts [Member] | Other Segments | EMEA [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 7,731 5,656
Nontraditional Long-Duration Contracts [Member] | Other Segments | Asia Pacific [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets $ 20,843 $ 14,680