Future Policy Benefits (Undiscounted and Discounted) (Details) - Other Operating Segment - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Life Insurance Product Line [Member] | Americas [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	$ 181,714	$ 178,510
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	82,173	84,652
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	190,089	189,168
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	79,736	83,317
Life Insurance Product Line [Member] | CANADA
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	52,016	56,133
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	21,009	22,816
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	53,540	58,139
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	20,986	22,966
Life Insurance Product Line [Member] | EMEA [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	27,238	25,934
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	14,697	14,822
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	27,218	25,796
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	14,264	14,251
Life Insurance Product Line [Member] | Asia Pacific [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	102,816	94,535
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	40,890	39,119
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	99,885	90,475
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	34,821	33,406
Insurance, Other [Member] | Americas [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	2,768	2,963
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	1,719	1,893
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	15,358	11,031
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	8,838	6,474
Insurance, Other [Member] | CANADA
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	5,815	4,572
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	3,795	3,080
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	17,381	4,310
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	7,939	2,917
Insurance, Other [Member] | EMEA [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	124,890	91,783
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	63,744	52,894
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	134,336	93,278
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	68,759	53,719
Insurance, Other [Member] | Asia Pacific [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	4,838	4,016
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	3,450	3,026
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	23,199	11,077
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	$ 12,746	$ 7,090