Future Policy Benefits (Premiums and Interest) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	$ 16,161	$ 13,771
Liability for Future Policy Benefit, Interest Expense	1,871	1,387
Life Insurance Product Line [Member] | Americas [Member] | Other Operating Segment
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	6,392	6,093
Liability for Future Policy Benefit, Interest Expense	584	549
Life Insurance Product Line [Member] | CANADA | Other Operating Segment
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	1,117	1,096
Liability for Future Policy Benefit, Interest Expense	214	212
Life Insurance Product Line [Member] | EMEA [Member] | Other Operating Segment
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	1,485	1,422
Liability for Future Policy Benefit, Interest Expense	42	40
Life Insurance Product Line [Member] | Asia Pacific [Member] | Other Operating Segment
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	2,874	2,655
Liability for Future Policy Benefit, Interest Expense	165	153
Insurance, Other [Member] | Americas [Member] | Other Operating Segment
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	2,979	1,496
Liability for Future Policy Benefit, Interest Expense	337	190
Insurance, Other [Member] | CANADA | Other Operating Segment
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	166	90
Liability for Future Policy Benefit, Interest Expense	145	2
Insurance, Other [Member] | EMEA [Member] | Other Operating Segment
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	924	701
Liability for Future Policy Benefit, Interest Expense	222	178
Insurance, Other [Member] | Asia Pacific [Member] | Other Operating Segment
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Gross Premium Income	224	218
Liability for Future Policy Benefit, Interest Expense	$ 162	$ 63