Segment Information (Total Revenues of Reportable Segments) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 3,930	$ 4,119
Other Segments | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	2,119	1,955
Other Segments | CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	387	369
Other Segments | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	658	603
Other Segments | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	709	751
Corporate and Other [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	57	441
Life Insurance Product Line [Member] | Other Segments | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,867	1,637
Life Insurance Product Line [Member] | Other Segments | CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	362	343
Life Insurance Product Line [Member] | Other Segments | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	476	457
Life Insurance Product Line [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	688	647
Nontraditional Long-Duration Contracts [Member] | Other Segments | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	252	318
Nontraditional Long-Duration Contracts [Member] | Other Segments | CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	25	26
Nontraditional Long-Duration Contracts [Member] | Other Segments | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	182	146
Nontraditional Long-Duration Contracts [Member] | Other Segments | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 21	$ 104