Segment Information (Reconciliation of Revenue from Segments to Consolidated) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 16,258	$ 16,658	$ 14,596
Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	8,729	8,690	7,780
Canada Segment Reporting Information [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,570	1,549	1,352
EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	2,453	2,443	2,104
Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	3,299	3,195	3,115
Corporate And Other Segment Reporting Information [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	207	781	245
Life Insurance Product Line [Member] | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	7,629	7,198	6,560
Life Insurance Product Line [Member] | Canada Segment Reporting Information [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,465	1,448	1,260
Life Insurance Product Line [Member] | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,830	1,827	1,633
Life Insurance Product Line [Member] | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	2,823	2,778	2,806
Insurance, Other [Member] | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,100	1,492	1,220
Insurance, Other [Member] | Canada Segment Reporting Information [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	105	101	92
Insurance, Other [Member] | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	623	616	471
Insurance, Other [Member] | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 476	$ 417	$ 309