Future Policy Benefits (Premiums and Interest) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	$ 1,456	$ 1,198
Liability for Future Policy Benefit, Gross Premium Income	7,649	7,196
Americas [Member] \| Life Insurance Product Line [Member] \| Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	361	353
Liability for Future Policy Benefit, Gross Premium Income	3,188	3,245
Americas [Member] \| Insurance, Other \| Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	267	245
Liability for Future Policy Benefit, Gross Premium Income	265	96
CANADA \| Life Insurance Product Line [Member] \| Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	111	106
Liability for Future Policy Benefit, Gross Premium Income	577	552
CANADA \| Insurance, Other \| Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	113	108
Liability for Future Policy Benefit, Gross Premium Income	89	97
EMEA [Member] \| Life Insurance Product Line [Member] \| Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	28	22
Liability for Future Policy Benefit, Gross Premium Income	929	892
EMEA [Member] \| Insurance, Other \| Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	207	138
Liability for Future Policy Benefit, Gross Premium Income	695	569
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	95	89
Liability for Future Policy Benefit, Gross Premium Income	1,611	1,516
Asia Pacific [Member] \| Insurance, Other \| Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	274	137
Liability for Future Policy Benefit, Gross Premium Income	$ 295	$ 229