Segment Information (Income Loss Before Provision for Income Tax of Reportable Segments) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ 380	$ (77)	$ 996	$ 337
Corporate and Other [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(11)	(92)	(157)	(173)
Other Segments | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	213	(16)	578	234
Other Segments | CANADA
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	36	18	116	76
Other Segments | EMEA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	24	39	166	169
Other Segments | Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	118	(26)	293	31
Life Insurance Product Line [Member] | Other Segments | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	105	(69)	288	81
Life Insurance Product Line [Member] | Other Segments | CANADA
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	6	12	70	54
Life Insurance Product Line [Member] | Other Segments | EMEA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(60)	5	(29)	43
Life Insurance Product Line [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	134	(73)	302	94
Nontraditional Long-Duration Contracts [Member] | Other Segments | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	108	53	290	153
Nontraditional Long-Duration Contracts [Member] | Other Segments | CANADA
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	30	6	46	22
Nontraditional Long-Duration Contracts [Member] | Other Segments | EMEA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	84	34	195	126
Nontraditional Long-Duration Contracts [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ (16)	$ 47	$ (9)	$ (63)