Segment Information (Total Assets of Reportable Segments) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 89,761	$ 92,175
Corporate and Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	5,647	7,905
Other Segments | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	48,189	49,600
Other Segments | CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	5,187	5,109
Other Segments | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	11,161	11,835
Other Segments | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	19,577	17,726
Life Insurance Product Line [Member] | Other Segments | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	20,960	20,572
Life Insurance Product Line [Member] | Other Segments | CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	5,144	5,091
Life Insurance Product Line [Member] | Other Segments | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,655	4,670
Life Insurance Product Line [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	10,769	10,048
Nontraditional Long-Duration Contracts [Member] | Other Segments | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	27,229	29,028
Nontraditional Long-Duration Contracts [Member] | Other Segments | CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	43	18
Nontraditional Long-Duration Contracts [Member] | Other Segments | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	6,506	7,165
Nontraditional Long-Duration Contracts [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 8,808	$ 7,678