Segment Information (Reconciliation of Assets from Segment to Consolidated) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 92,175	$ 84,656
Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	49,600	45,504
Canada Segment Reporting Information [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	5,109	4,695
EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	11,835	12,055
Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	17,726	12,496
Corporate And Other Segment Reporting Information [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	7,905	9,906
Life Insurance Product Line [Member] | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	20,572	20,071
Life Insurance Product Line [Member] | Canada Segment Reporting Information [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	5,091	4,682
Life Insurance Product Line [Member] | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	4,670	4,763
Life Insurance Product Line [Member] | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	10,048	8,197
Insurance, Other [Member] | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	29,028	25,433
Insurance, Other [Member] | Canada Segment Reporting Information [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	18	13
Insurance, Other [Member] | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	7,165	7,292
Insurance, Other [Member] | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 7,678	$ 4,299