Future Policy Benefits (Premiums and Interest) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	$ 1,198	$ 856
Liability for Future Policy Benefit, Gross Premium Income	7,196	8,535
Americas [Member] | Life Insurance Product Line [Member] | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	353	285
Liability for Future Policy Benefit, Gross Premium Income	3,245	3,061
Americas [Member] | Insurance, Other | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	245	154
Liability for Future Policy Benefit, Gross Premium Income	96	2,212
CANADA | Life Insurance Product Line [Member] | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	106	107
Liability for Future Policy Benefit, Gross Premium Income	552	553
CANADA | Insurance, Other | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	108	42
Liability for Future Policy Benefit, Gross Premium Income	97	71
EMEA [Member] | Life Insurance Product Line [Member] | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	22	21
Liability for Future Policy Benefit, Gross Premium Income	892	732
EMEA [Member] | Insurance, Other | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	138	108
Liability for Future Policy Benefit, Gross Premium Income	569	429
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	89	80
Liability for Future Policy Benefit, Gross Premium Income	1,516	1,381
Asia Pacific [Member] | Insurance, Other | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	137	59
Liability for Future Policy Benefit, Gross Premium Income	$ 229	$ 96