Future Policy Benefits (Premiums and Interest) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	$ 856	$ 651
Liability for Future Policy Benefit, Gross Premium Income	8,535	6,079
Americas [Member] | Life Insurance Product Line [Member] | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	285	262
Liability for Future Policy Benefit, Gross Premium Income	3,061	2,935
Americas [Member] | Insurance, Other | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	154	88
Liability for Future Policy Benefit, Gross Premium Income	2,212	166
CANADA | Life Insurance Product Line [Member] | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	107	104
Liability for Future Policy Benefit, Gross Premium Income	553	535
CANADA | Insurance, Other | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	42	1
Liability for Future Policy Benefit, Gross Premium Income	71	46
EMEA [Member] | Life Insurance Product Line [Member] | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	21	16
Liability for Future Policy Benefit, Gross Premium Income	732	697
EMEA [Member] | Insurance, Other | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	108	80
Liability for Future Policy Benefit, Gross Premium Income	429	335
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	80	73
Liability for Future Policy Benefit, Gross Premium Income	1,381	1,257
Asia Pacific [Member] | Insurance, Other | Other Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Interest Expense	59	27
Liability for Future Policy Benefit, Gross Premium Income	$ 96	$ 108