Future Policy Benefits (Premiums and Interest) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	$ 322	$ 323
Liability for Future Policy Benefit, Gross Premium Income	3,062	2,896
Americas [Member] | Life Insurance Product Line [Member] | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	130	125
Liability for Future Policy Benefit, Gross Premium Income	1,422	1,397
Americas [Member] | Insurance, Other | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	43	46
Liability for Future Policy Benefit, Gross Premium Income	156	8
CANADA | Life Insurance Product Line [Member] | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	51	56
Liability for Future Policy Benefit, Gross Premium Income	262	272
CANADA | Insurance, Other | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	1	1
Liability for Future Policy Benefit, Gross Premium Income	23	23
EMEA [Member] | Life Insurance Product Line [Member] | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	8	8
Liability for Future Policy Benefit, Gross Premium Income	355	361
EMEA [Member] | Insurance, Other | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	40	43
Liability for Future Policy Benefit, Gross Premium Income	161	163
Asia Pacific [Member] | Life Insurance Product Line [Member] | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	37	33
Liability for Future Policy Benefit, Gross Premium Income	620	629
Asia Pacific [Member] | Insurance, Other | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	12	11
Liability for Future Policy Benefit, Gross Premium Income	$ 63	$ 43